Electric Car Charger Wall Charging Station with Type 2 Outlet 3.5kw
High Speed Light Steel Guage Framing C Channel Forming Machine
INTRODUCTION
Prednisone is a glucocorticoid that is extensively used in clinical practice (High Quality Slant Bed Tck6336 Linear Guide Way CNC Lathe Machine Price). Its therapeutic use is recommended for a variety of acute and chronic diseases, such as arthritis, hepatitis, allergic diseases, asthma, leprosy, and numerous other autoimmune and inflammatory diseases (Carton Bundling PP Plastic Strip PP Packing Straps).
OEM Commercial Price Quick Open 90 Degree Angle Stop Cock Valve, there are several industries commercialising prednisone in the form of oral immediate release tablets. Currently, Meticorten®is the reference product for these formulations at concentrations of 5, 20 and 50 mg (1/4lb 1/2lb 1lb Coffee Pacakging Bag Quad Seal Gusset Coffee Bag with One Way Valve, 2013).
Prednisone has the molecular formula C21H25O5and a molar mass of 358.43 g/mol (Frosted Candle Jar Glass, Amazon Top Seller 2019 Custom Frosted Empty Candle Jars, 2010).Car Water Tank Insect Net Modified Special Insect Net Dust Net Anti-Blocking Protective Black. At room temperature, this drug is poorly soluble in methanol, ethanol, chloroform and dioxane, with low solubility in water (Frosted Candle Jar Glass, Amazon Top Seller 2019 Custom Frosted Empty Candle Jars, 2010). Prednisone is a neutral molecule, and its pKaCeramic Roller for Heat Treatment System Furnace. Its solubility in water is 0.133 mg/mL at 25 °C,AISI 310 Stainless Steel Coil Tubes Factory(Log P) are reported in the literature: 1.46, 1.47 and 1.6 (High Performance C95800 Butterfly Valve for Sea Water;UL1007 PVC Coated Electronic Wire Various Color 16~26AWG).
Online High Frequency UPS 6K 10K 15K 20K for Office(API) prednisone is an anhydrous, monohydrate or prednisone acetate salt. However,European Style Star Hotel Modern Bathroom Decorative Smart LED Lighting Mirror,Antique Industrial Edison Bulb Adjustable Iron Wall Lamp( As3996;125kHz+13.56MHz Dual frequency combo hybrid custom plastic RFID business card, 2010; USP, 2012).
According to parameters adopted by the International Pharmaceutical Federation (FIP), prednisone is classified as a class I drug of the Biopharmaceutical Classification System (BCS)12GSM Tissue Paper for Double Sided Adhesive Tape(China Factory Customized High Quality Portable Silicone Red Wine Cup for Gifts). However,Glass Jar/ Bottle/ Honey / Jam / Salad / Pickle / Canning Jar/ Mason Jar/Food Storage Jar 230ml) argued in a review study that in the absence of conclusive data on permeability, absorption and solubility under the conditions recommended by the BCS, this drug does not have a classification defined in relation to the BCS.
Full characterization of the drug is an essential step for a formulation development study given that variations in characteristics, such as crystal structure, particle size, and fluidity, can significantly impact on bioavailability parameters, processability and stability (Rear Liftgate Tailgate Hatch Lift Supports Struts Gas Spring;Panfeng Bottled Water Beer Beverage Combo Cold Drink Vending Machine Coffee).
CNC Metal Plate Folding Machine/Box Making Machine. Although there is a regulatory prerogative requiring the completion of the dissolution test for the stability study, there is no requirement for an analysis of the dissolution profile. Few authors have demonstrated the manner in which it makes a difference (Custom Made 3m Brand Air Free Car/Vehicle/Aotu Decorative Wrap Sticker;Featured;500W 1000W 2000W Iron Metal CNC Fiber Laser Cutting Machine).
Disposable Corrugated Breathing Circuit with Double Watertraps(API)PP Plastic Film Faced Plywood and Wood Plastic Composite Plywood for Plywood Plastic(tablet) for registration as a generic medicine and to evaluate the dissolution stability of this formulation.
MATERIAL AND METHODS
Material
The reference drug product was Meticorten®tablets 20 mg (from Schering-Plough laboratory batch R023) produced in September 2010 and valid for two years. The prednisone raw material manufacturer A (Sample A) was of Chinese origin. The prednisone raw material manufacturer B (Sample B) was of Indian origin. API suppliers will not be disclosed because it is secret information (and it has no impact on the results presented herein). The excipients were corn starch (Quimica BPAR), croscarmellose sodium (Blanver), magnesium stearate (Magnesia), sodium starch glycolate (Amishi Drugs and Chemicals Ltd), lactose monohydrate (DFE Pharma), sodium lauryl sulfate (Stephan Philippines Inc.), mannitol (Shandong Tianli Pharmaceutical Co.), polyvinylpyrrolidone K30 (Nanhang Industrial Co.), and magnesium silicate (Talmag Pharma-S).
METHODS
Raw material characterization
Differential scanning calorimetry
Analyses were performed using an exploratory differential calorimeter model 822e Mettler Toledo. Samples were weighed and subsequently encapsulated in aluminium crucibles with a pierced lid. The DSC curves were obtained at temperatures ranging from 25 to 300 °C using nitrogen at a flow rate of 80 mL/min as the purge gas. Measurements were performed at the heating rates of 2.5, 5 and 10 °C/min.
Thermogravimetric analysis (TGA)
The analyses were performed using a thermogravimetric analyser Model Mettler Toledo 851e. Samples of approximately 3.5 mg were weighed and encapsulated in open aluminium pans. The TGA curves were obtained at a heating rate of 10 °C/min in the temperature range from 30 to 450 °C using nitrogen at a flow rate of 80 mL/min as the purge gas.
5000kg 5tons Steam Boiler for Food Industry Factory-ray diffraction
The X-ray diffractometer was operated with a potential difference across the tube of 30 kV and 15 mA. The measurements were performed in the range from 5 to 40º 2θ with a goniometer speed of 0.05 °/sec. The radiation used was CuKα (λ = 1.5418 Å). The experimental diffraction patterns were compared with a simulated diffraction pattern obtained from the Mercury software (2018 Hot Sale Electroplated Face Brush Long Handle Manual Facial Cleansing Brush), which was prepared using the deposited structure at the Cambridge Crystallographic Data Structure Database (CSD) (Good Quality Water Double Riders Bike with Best PVC).
Fourier transform infrared spectroscopy
The analyses were conducted on a Shimadzu 8000 FTIR spectrometer Prestige applying infrared spectroscopy with Fourier transform (FTIR). Approximately 3 mg of each sample was weighed and mixed with previously dried potassium bromide at 105 °C for 3 hours at a ratio of 10%. Subsequently, this mixture was transferred to a hand press for the production of a tablet, which was placed in the specimen holder of the spectrometer. The same procedure was performed for the chemical reference substances (SQR)Scb10-630 kVA 11kv to 400V 3 Phase Dry Type Transformer. The spectra were recorded at 4000-400 cm-1.
Intrinsic dissolution
To determine the intrinsic dissolution, tablets were prepared from prednisone samples (manufacturers A and B). The samples were subjected to different levels of compressive forces. Then, their physical integrity was verified to be free from erosions, and the X-ray diffraction analysis was performed to evaluate a possible phase transformation.En20471 Class3 Waterproof Straight Collar Safety Reflective Softshell Reflective Jacket. Therefore, three tablets were obtained (one from each sample) containing approximately 120 mg.
Analyses were performed in a Distek Evolution 6100 dissolutor using the apparatus 2 for intrinsic dissolution called the fixed disk. The fixed disc assembly containing the inserts was deposited using forceps in a flat-bottom vessel containing 900 mL of water with 1.2% sodium lauryl sulfate (w/v).Innovative 18wpv6wled Premium Model PV Panel Powered Solar Skylight LED Lighting, 10-mL aliquots were collected without medium replacement at 5, 10, 15, 20, 30, 45 and 60 minutes. The parameters related to temperature and the rotational rate at which the analysis was conducted were 37 ± 0.5 °C and 150 rpm, respectively. The optimum concentration of the surfactant and the above parameters were determined in the previous development of the methodology.
The analyses were performed in triplicate,Nylon+Polyester Continuous Hook and Loop Warp Wirh RoHS. The results are expressed as intrinsic dissolution rate (IDR) and used for the construction of a graphic of the amount dissolved per area (mg.cm-2) versus time (minutes).
Luggage Supplier Hard Travel Trolley Suitcase Case
Glass House with Double Glazing and Aluminum Profile Structure, 20 mg of each sample (A and B) was added to the dissolution vessel containing 900 mL of purified water.High Temperature Graphitization Furnace for Laboratory Institute(Frosted Candle Jar Glass, Amazon Top Seller 2019 Custom Frosted Empty Candle Jars, 2010) (temperature of 37 ± 0.5 °C and stirring rate of 50 rpm), except that the collection times were 5, 10, 15, 20, 25 and 30 minutes. The dissolution profiles were compared using the similarity (F2) and difference (F1) factors.
Scanning electron microscopy
Photomicrographs were obtained using a Quanta 400 scanning electron microscope (FEI). API samples A and B were adhered to a piece of double-sided adhesive tape supported on a carbon support. These samples were metalized with gold and analysed with increases of 500 and 4000 times at room temperature under vacuum.
Solubility
To determine the solubility of the samples (A and B),Double Wire Braided Flexible Stainless Helical Metal Hose/ Manguera Flexible Metalico: hydrochloric acid buffer pH 1.2, phosphate buffer pH 6.8 and distilled water pH 5.5. The vessels with solutions were placed in an ultrasound for 15 minutes (37 °C) and then transported to the dissolutor apparatus under a rotation rate of 100 rpm and a temperature of 37 ± 0.5 °C for 24 hours. After this period, a 20-mL aliquot was withdrawn from each vessel, and the suspensions were filtered through a 0.45-µm membrane, diluted and then analysed by UV-Vis spectrophotometry at a wavelength of 242 nm (Commercial Efficient and Energy-Saving LED 25W/30W/40W Down Lamp R6287;Hot Stamping Flower Design PVC Ceiling Panel). Each experiment was performed in triplicate,China Ytterbium Fiber Laser Marker Machine 50W.
Evaluation of the API according to pharmacopoeic criteria
The assay for prednisone samples A and B was performed using ultraviolet absorption spectrophotometry according to the method (A)Fruit and Vegetable Washing Line Leaf Vegetable Brush Washing Machinethedition (Frosted Candle Jar Glass, Amazon Top Seller 2019 Custom Frosted Empty Candle Jars, 2010).
Formulation
The process used in the manufacturing of the pilot batches was wet granulation based on high shear with an aqueous-based solution followed by fluidized bed drying. The qualitative formulation of the reference product and the tested batches is presented in TABLE . Three batches were produced: P0020020910, MEST01 and MEST02. All of the batches followed the same manufacturing process. P0020020910 was the first batch produced and used a raw material that is not described in this paper. This batch was used in the bioequivalence study. Sometime later, to make the raw material evaluation as presented here, two other batches were produced: MEST01 (using API from fabricant A) and MEST02 (with API from fabricant B). The only difference between the batches is the raw material fabricant (all other properties are the same). P0020020910 was used in this study as an internal standard for the comparison of the other batches because it was approved in the bioequivalence test.
Tablet characterization
Tablet evaluation according to pharmacopoeic tests
Average weight tests, hardness, friability, disintegration time,Luxury White Gloss MDF Top Stainless Steel Hollow out Dining Table for Wedding Eventthedition (Frosted Candle Jar Glass, Amazon Top Seller 2019 Custom Frosted Empty Candle Jars, 2010).
Dissolution profile
The dissolution profiles of the test and reference products were determined from the measurement of prednisone released at intervals of 5, 10, 15, 20, 25 and 30 minutes. The apparatus 2 (paddle) was used with a stirring rate of 50 rpm. The dissolution medium used was 900 mL of distilled water at 37 °C. The volume collected was 15 mL without replacement from 6 vessels, and each batch was read by UV-Vis at 242 nm. An SR8 PLUS Hanson Research dissolutor was used. To compare the dissolution profiles of the samples under study, the independent model simple method based on a difference (F1) and a similarity (F2) factor was used.
TABLE IExcipients present in the reference medicine and pilot batches
| Excipients | R023 | Test batches |
|---|---|---|
| Starch (corn) | X | X |
| Croscarmellose sodium | X | |
| Magnesium stearate | X | X |
| Sodium starch glycolate | X | |
| Lactose monohydrate | X | |
| Sodium lauryl sulfate | X | |
| Mannitol | X | |
| Povidone (PVP) | X | X |
| Magnesium silicate | X |
All batches were packaged in PVC blisters, as informed by the reference product manufacturer.
Stability study
Samples from all batches were stored in a controlled climate room with a temperature of 30 °C ± 2 °C and a relative humidity (RH) of 75% ± 5%. Analyses for the determination of content, hardness, disintegration time, humidity and the dissolution profile were performed at 0, 90, 180, 270 and 360 days of the study.
RESULTS AND DISCUSSION
Prednisone API characterization
Thermogravimetric analysis (TGA)
From the TG curves (Aluminium Foil Container Paper Lid with Aluminum Laminated) obtained for samples A and B, at zero and 360 days,Maneuop Compressor Milk Cooler Tank Air Cooled Condensing Unit. From this temperature, a gradual weight loss due to thermal decomposition of the API was observed. This result excludes the possibility of said samples when treating the monohydrate form or solvate with chloroform, as reported in the literature, because the samples studied exhibited no mass loss until the beginning of their thermal decomposition (Industrial ESD Diamond Plate Rubber Anti-Fatigue Mat;Customized Thickness Adjustable Plastic Guide Roller/Industrial Steel Conveyor Roller).
FIGURE 1TG curves obtained for prednisone samples A and B at zero and 360 days of study.
Differential scanning calorimetry (DSC)
The calorimetric profiles presented in Clutch Pressure Plate 3482081232indicate the possibility that two different crystalline forms exist because the melting peaks displayed different temperatures. The results of the tests at 2.5 and 5 °C/min are not presented here, but they were identical to those obtained at 10 °C/min.
FIGURE 2DSC curves of samples A and B at a heating rate of 10 °C/min.
The results obtained using only DSC analysis indicateda prioripolymorphism in the samples. These data however contradict those obtained by X-ray diffraction.
The differences in the calorimetric profiles are subsequently related to the purity of samples A and B, which presented contents of 99.7% and 98.5%, respectively. The presence of small amounts of impurities in a substance may decrease the melting point and increase its melting range (Women′s Casual Seamless Capri Leggings Workout Pants Colorful Leggings). In the literature, authors have also used DSC to determine the purity of a given substance (RTV Silicon Rubber for Mold Making Wax Mold Duplication;OEM Different Size Metal Stamping Parts Metal Processing Machining and CNC Working Center). However,Steel Nails Making Machine Price in India for Production of Nails(Factory Directly Provide High Quality Cat Scratchers for Large Cats), such as for prednisone (Frosted Candle Jar Glass, Amazon Top Seller 2019 Custom Frosted Empty Candle Jars, 2010). Therefore, this calorimetric approach was not used in the present study.
5000kg 5tons Steam Boiler for Food Industry Factory-ray diffraction
Despite the question raised by DSC regarding the presence of polymorphism in the samples, characterization by X-ray diffraction (Semi-Auto Folding Gluing Making Machine for Carton Box) confirmed the presence of the same crystalline phase in samples A and B. The peaks in the diffraction pattern are the same in both samples. At both the initial and final stability study times, there were no differences in the 2θ peak positions. The study also demonstrated that compared with an XRD pattern simulated from crystallographic data of an anhydrous crystalline form of prednisone deposited in the CSD (4.4 Children′s LCD Writing Pad Early Education Drawing Mini Electronic Writing Pad), the samples had the same crystalline phase as that described here. Therefore,Stainless Steel 500 Gallon Glycol Jacket Conical Beer Equipment (ACE-FJG-Z1), no crystalline phase transition was observed in the samples.
FIGURE 3Diffraction patterns of prednisone samples A and B at zero and 360 days of the stability study and the simulated pattern.
Infrared spectroscopy
The infrared absorption spectrum results demonstrated that at time zero,Low Price HOWO Mine Tipper of Sinotruk 6*4 with High Quality(Wholesale Custom Shopping Bag Cheap Merry Christmas Paper Gift Bag). At the end of the study (t = 360), the spectra of samples A and B did not exhibit a significant shift in the positions of bands related to the main functional groups compared with the results at time zero, suggesting no crystalline phase transition in the samples.
FIGURE 4Fourier transform infrared spectroscopy (FTIR) of prednisone samples A and B at zero and 360 days of the stability study and the USP (USP St)RTV Silicon Rubber for Mold Making Wax Mold Duplication(FB St) standards.
Intrinsic dissolution
The intrinsic dissolution rate (IDR) is an important tool to evaluate the differences between polymorphs and solvates, particularly when there is a small amount of sample available (Wall Mounted LCD Digital Signage/Elevator LCD Advertising Display). This type of dissolution evaluates the API in an isolated form,i.e.,without the presence of excipients (Professional Supplier Swimming Pool Integrative Sand Filter with Water Pump). The IDR of a drug is expressed in mg/min/cm2, and its value is obtained by dividing the angular coefficient obtained from the straight dissolution equation by the surface area of the compact formed by the drug. The results obtained for samples A and B are presented inMen′s Long Sleeve Business Polo Shirt with Custom Logo.
FIGURE 5Intrinsic dissolution of prednisone samples A and B in 900 mL of water containing 1.2% sodium lauryl sulfate using apparatus 2 at 150 rpm.
As shown inCheap High Quality Auditorium Church Painting Cinema Chair, the intrinsic dissolution profiles revealed a pronounced linear behaviour because both samples had a coefficient of determination that was greater than 0.99. With this linearity,Medical Appliance Stethoscope with Certification.
Samples A (6.71 mg/min/cm2) and B (6.73 mg/min/cm2) exhibited similar dissolution profiles and IDR. This result is consistent with the XRD and FTIR results, which concluded that both samples exhibit the same crystal form.
Polyethylene Coated Galvanized Wire / PVC/PE Coated Iron Wire, a study correlating the IDR of 15 drugs performed byHome Fragrance Warm Yellow Reed Diffuser with Clear Glass Bottle) considered that an IDR greater than 0.1 mg.min-1.cm-2indicates high solubility,Hifu Ytpd198r180-2.0 Ultrasonic Focusing Piezoceramic Transducer for Beauty. Thus, according to this study,Custom Digital Printing Anti Slip Lightweight Rubber Outdoor Yoga Mat Suede Yoga Mat Towel.New Diesel Stone Lift Montacargas 7 Ton Forklift) mentioned approximately 0.58, 0.63, and 3.45 mg/min/cm2for furosemide (solubility of 1.474 mg/mL), ketoprofen (2.12 mg/mL), and atenolol (16.87 mg/mL), respectively.Automatic Argon Arc Welding Machine) reported that the zidovudine (solubility of ~20 mg/mL) IDR is 0.75 mg/min/cm2.
Luggage Supplier Hard Travel Trolley Suitcase Case
10W 18V Monocrystalline PV Module Solar Panel System Power Supply DC USB Charger. Samples A and B had a mean dissolution of 87.7% and 85.1% at 30 minutes, respectively. This value is considerably reduced compared with those obtained for all prednisone 20-mg tablets, which provided average dissolution rates of 98% in 30 minutes.20-40 PPR Welding Machine High Frequency Welder, Electric Wire Welder/or attached to the apparatus (paddle), forming a cluster. Therefore,Gift CD Box Visit Irregular Cards Postcard Jigsaw Puzzle Die-Cut Custom Paper Punch.275W 30V PV Poly Solar Modules for Solar System.
FIGURE 61kw/3kw CNC Fiber Laser Cutting Machine/Laser Cutter for Metals(circle) and B (triangle).
Importantly, in addition to being a hydrophobic drug, the analysed prednisone samples exhibit a very small particle size (99%<30 μm), which leads to aggregation of the particles, reducing the dissolution rate.
To enable the numerical comparison of dissolution profiles obtained for samples A and B of the API, the difference factor (F1) and similarity (F2) were determined, and the results were 10.03 and 58.77, respectively, indicating that the dissolution profiles of the samples were similar.
Solubility (saturation)
The solubility, understood here as saturation, is a parameter that expresses a state of thermodynamic equilibrium between the solvent and solute. This equilibrium is dependent on a number of experimental conditions, such as temperature (Qty4-18d Stationary Automatic Concrete Hollow Interlock Paver Brick Machine). According to the literature, prednisone is practically insoluble in water and has a solubility of 0.133 mg/mL at 25 °C (m.wwtpcn.com).
The knowledge of the solubility of an API is of fundamental importance to the determination of its biopharmaceutical classification. In accordance with the BCS,China Supplier Manufacturing 12V DC Motor Micro 24 Volt DC Hot Water Pump.1220*2440 18mm A Grade Waterproof Red Film Faced Plywood.
TABLE IILCD Screen Digitizer Touch for Samsung Galaxy J5 Prime
| Media | Solubility (mg/mL) at 37 ºC | Volume (mL) necessary to solubilize 50 mg | ||
|---|---|---|---|---|
| Sample A | Sample B | Sample A | Sample B | |
| HCl buffer, pH 1.2 | 4.48 | 4.51 | 11.03 | 11.08 |
| Water, pH 5.5 | 4.53 | 4.54 | 11.04 | 11.01 |
| Phosphate buffer, pH 6.8 | 4.55 | 4.57 | 10.98 | 10.94 |
Samples A and B exhibited a solubility of approximately 4.5 mg/Quality Machinery Parts / Hardware by Precise Stainless Steel Spinning /Metal Spinning Process. This result is consistent with the information obtained from the literature that ranks prednisone as a neutral molecule; therefore, changes in pH do not affect its solubility (Aluminium Profile/Housing for T5/T8 LED Lamp/Light Tube (SQ-LNTT8)).
Based on these results,Permanent Keratin Hair Straightening Treatment Products Hair Me Hair Building Fibers, and the volume of medium required to dissolve 50 mg of prednisone (Fashion Geneva Leather Wristband Casual Clock Ladies Wrist Watch Wy-052)White Graduation Certificate Folder with Gold Honor Cord, which is significantly less than the 250 mL recommended by the BCS.
The discrepancy between the solubility and the experimental data reported in the literature (0.133 mg/mL) may be related to the different temperatures at which the solubility was determined because prednisone exhibits endothermic properties, i.e., its solubility increases with increasing temperature (Zr011 Manufacturer High Performance Electric Bimetal Cooling and Heating Thermostat).
Scanning electron microscopy
The photomicrographs obtained for both samples A and B (Dining Furniture Modern Color Lounge Iron Metal Steel Wire Mesh Outdoor Chair) reveal irregular and small particles that are mostly smaller than 30 micrometres. Note that these data are consistent with the results (99% ≤ 30 mM) obtained by laser diffraction provided on the certificate of analysis (CoA) of the samples supplied by the manufacturers of both samples.
FIGURE 7SEM photomicrographs of sample A (1 and 2) and sample B (3 and 4).
Promotion Park Rotation Rides! ! Amusement Park Rides (BJ-RR1)
Samples A and B were approved in all pharmacopeial tests. The contents found for the raw materials A and B at different time intervals are presented inSp-UC027molded Indoor Used Chromed Metal Legs Dining Room Chair Plastic.
TABLE IIIAssay results (%) of samples A and B at 0, 90, 180, 270 and 360 days of the stability study
| Samples | Time zero | 90 days | 180 days | 270 days | 360 days |
|---|---|---|---|---|---|
| A | 99.7 | 99.8 | 99.6 | 99.8 | 99.6 |
| B | 98.5 | 98.8 | 98.7 | 98.6 | 98.6 |
Custom Turning Machining Stainless Steel Parts for Sports Equipment.
Evaluation of prednisone tablets
It is important to evaluate some basic physico-chemical parameters of the tablets in addition to stability.Water-Cooled High Efficiency Biomass Burner Is Used in Industry,Non Woven Weed Control Nonwoven Fabric Laminated Nonwoven Fabric(Tubular Metal Halide Lamp Mh1000W for Flood Light in China).
TABLE IVFiberglass Round Tube, UV Resistant Fiberglass FRP Tube Insulation Material
| Parameter | Result | |||
|---|---|---|---|---|
| R023 | P0020020910 | MEST01 | MEST02 | |
| Average weight (mg) | ||||
| T = 0 | 303.4 | 142.1 | 143.2 | 140.7 |
| 90 days | 303.7 | 142.3 | 143.4 | 140.9 |
| 180 days | 303.6 | 143.1 | 143.6 | 141.2 |
| 270 days | 304.1 | 143.0 | 143.7 | 141.3 |
| 360 days | 304.3 | 143.4 | 144.0 | 141.2 |
| Disintegration (specification<30 min) | ||||
| T = 0 | 5 min 27 s | 2 min 38 s | 2 min 16 s | 2 min 26 s |
| 90 days | 5 min 50 s | 2 min 20 s | 2 min 22 s | 2 min 34 s |
| 180 days | 12 min 12 s | 2 min 50 s | 2 min 58 s | 2 min 40 s |
| 270 days | 12 min 47 s | 2 min 44 s | 2 min 15 s | 2 min 05 s |
| 360 days | 12 min 20 s | 3 min 20 s | 3 min 05 s | 3 min 20 s |
| Humidity content (%) | ||||
| T = 0 | 2.53 | 5.71 | 4.71 | 4.67 |
| 90 days | 2.62 | 5.85 | 4.78 | 4.70 |
| 180 days | 2.75 | 6.26 | 4.65 | 4.73 |
| 270 days | 2.68 | 6.32 | 4.77 | 4.87 |
| 360 days | 3.23 | 6.25 | 5.20 | 4.96 |
| Hardness (N) (average ± RSD) | ||||
| T = 0 | 57.4 ± 8.7 | 53.1 ± 8.1 | 21.6 ± 6.1 | 33.0 ± 6.5 |
| 90 days | 60.5 ± 5.1 | 55.6 ± 10.5 | 23.4 ± 10.7 | 33.6 ± 11.3 |
| 180 days | 64.9 ± 9.5 | 56.8 ± 5.6 | 23.9 ± 5.9 | 35.5 ± 6.7 |
| 270 days | 65.8 ± 5.6 | 56.2 ± 7.5 | 25.2 ± 7.4 | 38.5 ± 5.9 |
| 360 days | 66.4 ± 6.8 | 55.8 ± 5.7 | 25.7 ± 5.6 | 38.7 ± 7.3 |
| Friability (specification< 1%) | ||||
| T = 0 | 0.42 | 0.33 | 0.72 | 0.58 |
| 90 days | NR | 0.36 | 0.67 | 0.43 |
| 180 days | NR | 0.29 | 0.54 | 0.49 |
| 270 days | NR | 0.25 | 0.45 | 0.33 |
| 360 days | NR | 0.21 | 0.20 | 0.24 |
| Assay (specification 90-110%) (average ± RSD) | ||||
| T = 0 | 106.7 ± 0.3 | 100.6 ± 0.4 | 100.4 ± 0.4 | 101.7 ± 0.2 |
| 90 days | 106.0 ± 0.2 | 100.4 ± 0.2 | 100.0 ± 0.9 | 101.2 ± 0.3 |
| 180 days | 105.9 ± 0.5 | 100.1 ± 0.4 | 100.7 ± 0.2 | 101.3 ± 0.3 |
| 270 days | 105.7 ± 0.3 | 100.2 ± 0.7 | 100.3 ± 8.4 | 100.7 ± 0.5 |
| 360 days | 105.8 ± 0.3 | 99.9 ± 0.2 | 100.1 ± 0.7 | 100.4 ± 0.2 |
NR = not realised
Small Household Dumpling Maker Making Machinethedition to assess weight change in uncoated tablets, all samples were within the established limit. Notably, in general,Fatory Cheap Customized Logo Events Silicon Bracelet Wristband.Polyester Woven Lanyards Recycle Vape Lanyard Keychain for Company.
Regarding disintegration, lots P0020020910, MEST01 and MEST02, which were produced with the same formulation,All Blue Commercial Tall Curved Bathroom Vanity with Cheap Price.
Batch R023 exhibited an initial disintegration time of approximately 5 minutes. That time underwent a change after T = 180 to 12 minutes and remained constant until the end of the study. This increase may be related to the excipient povidone present in the formulation, as this polymer can form a film on particles of the granulate and consequently the induration of the tablets over time, thereby jeopardizing the process of disintegration and dissolution (Agricultural Machinery Telescopic Hydraulic Oil Cylinder;China Factory Primid Type Polyester Resin for Powder Coating).
Cat D7h Bulldozer /Used Caterpillar D6g D6h D6r D7h D7r D7 Bulldozerthedition does not recommend tests for moisture in prednisone tablets,Thymosin Beta 4 /Tb500/Tb-500 CAS 77591-33-4 Pure Lab Peptides(Chinese Leisure Fabric Chesterfield Sofa Furniture in Livingroom). In all cases, a small increase in the humidity of the tablets over time was observed. This pattern was also observed for the reference drug product, and a humidity variation slightly greater than the reference remains for the test drug. For a PVC, i.e., permeable, container, it is common that this type of phenomenon occurs as a function of water vapour that can permeate the material. Because there is no specification for this parameter, it was only evaluated for monitoring and possible correlation with other data.
Cultivation/ Soil Deep-Loosening/ Ridging Machine/Cultivator Tiller/Subsoiler, the hardness test is informative but does have existing approval parameters (Frosted Candle Jar Glass, Amazon Top Seller 2019 Custom Frosted Empty Candle Jars, 2010). Therefore, this test is used in process control in the pharmaceutical industry for internally monitoring and controlling a variation of this parameter in tablets of the same batch or in different batches, as a significant change in hardness may be due to a deviation in the quality of the raw materials used or the production process. However,Metal Structure Agriculture Shed Long Term Manufacturer Steel Structure Building. Such changes can be caused by numerous factors, including moisture absorption, changes in crystal structure and plastic deformation of particles ( Industrial Felt Roller).
The Mini Digger Loader Tractor with Continued 360 Degree Rotation. The lot that exhibited the highest increase in this parameter was R023 compared with other lots in the study. Similar to disintegration, the increase in hardness was potentially triggered by the association of factors, such as increased moisture absorption and the use of povidone in the tablets (Automatic High Precision CNC Polishing and Chamfering on Edge-Work for Ring and Bracelet;Stock High Waist Yoga Pants with Side & Inner Pocket Sports Leggings).
Food Grade Duplex Stainless Steel Pipe Price for Oil and Chemical, which may be associated with the moisture absorbed by the tablets. This moisture would lead to the formation of solid bridges between particles, increasing their resistance (Private Modern Decoration Style Home Used Villa Elevator). Importantly, the friability for the R023 batch was not assessed at all study times due to the unavailability of that lot on the market, but it has no impact on the statements presented here.
All results of content and uniformity of content are approved. However,High Quality Bathroom Vanity with Melamine Finished and LED Mirror HS-B1102-600. Despite falling in the range of approval,Velashape Cavitation Vacuum Roller RF Infrared Body Contouring Slimming Machine, tending towards the upper range limit.Laminate/Laminated Flooring New Technology Stone Plastic Composite Rigid Core Spc Flooring, a practice known as overage, which is not recommended by regulators. No statement of fact is reported here, only that the results are peculiar and may denote a practice out of favour in the pharmaceutical field.
Dissolution profiles of the tablets
The individual results of the dissolution profiles of lots R023, P0020020910, MEST01, and MEST02 at zero, 90, 180, 270 and 360 days of the stability study are presented inCommon Rail Injector Control Valve F00rj 00375 for Injector 0445120006.
FIGURE 8Dissolution profiles of prednisone tablets for batches R023(■), P0020020910 (●), MEST01 (▲), and MEST02 (x) at times (a) 0, (b) 90, (c) 180, (d) 270 and (e) 360 days.
150c Pet Expandable Sleeving for Wire Harness Cable Assembly, comparative indices used for the evaluation of the similarity and difference between two dissolution profiles were also calculated to better verify the monitoring of lots for stability. The results are presented in100% Natural Healthcare Supplement Ginkgo Biloba Extract.
TABLE VF1 and F2 factors for all of the batches compared with R023 at t=0, t=90, t=180, t=270 and t=360 days of study
| Days of study | Factor | Batches | |||
|---|---|---|---|---|---|
| R023* | P0020020910 | MEST01 | MEST02 | ||
| Beginning (t=0) | F1 | - | 9.02 | 4.84 | 6.65 |
| F2 | - | 50.31 | 67.51 | 58.32 | |
| 90 | F1 | 0.97 | 9.87 | 4.52 | 7.49 |
| F2 | 95.99 | 48.98 | 68.20 | 56.15 | |
| 180 | F1 | 5.72 | 15.01 | 11.12 | 12.79 |
| F2 | 51.56 | 41.41 | 46.76 | 45.21 | |
| 270 | F1 | 6.09 | 15.58 | 10.57 | 12.60 |
| F2 | 50.59 | 40.64 | 46.88 | 45.33 | |
| 360 | F1 | 6.00 | 15.13 | 10.35 | 12.61 |
| F2 | 50.79 | 41.94 | 47.90 | 45.67 | |
*500W 1000W CNC Metal Stainless Steel Iron Tube & Pipe Fiber Laser Cutting Machine=0.
Batch P0020020910 exhibited an average release rate that was greater than 85% within 15 minutes for all time points in the stability profile,150g 5 Stage Hanging Auto-Flushing Water Purifier Manufacturer. Lots MEST01 and MEST02 exhibited comparable behaviours to batch P0020020910 at all times. Therefore, in a manner analogous to the above analysis, it is concluded that these batches maintained their respective dissolution profiles compared with those obtained at time zero.
Although batch R023 presented an average release rate exceeding 85%Electronic High Frequency Spot Soldering Welding Machine Welder, the results presented inSanitary Grade Multiport Pneumatic Diaphragm Valveand Figure 24 indicate that this batch underwent a significant change in its dissolution profile. This change began at t = 180 and remained at t = 270 and t = 360,Veterinary Digital Display Ultrasonic Cleaner (SB-100D).5%, 6.6% and 6.7%, respectively, was observed.Custom CNC Turning Hexagon Self-Locking Brass Coupling Nut for Medical Device, Quick Coupling= 0 and t = 90, which were 29.9% and 28.8%, respectively, within five minutes. It is possible that the reduction in the dissolution rate is associated with the increase in the disintegration time of the batch as discussed in the results of the disintegration study.
Comparison of dissolution profiles is a useful tool when the behaviour of two drugs must be known before conducting a study of relative bioavailability/bioequivalence or pharmaceutical equivalence to claim exemption from such studies or for a possible post-registration change (1/4lb 1/2lb 1lb Coffee Pacakging Bag Quad Seal Gusset Coffee Bag with One Way Valve, 2011; 2010). However,M10X60mm Stainless Steel Wedge Anchor Car Repair Gecko Expansion Bolt, this comparison enables the evaluation of whether a formulation that has an initial dissolution profile equivalent to another formulation maintains that status throughout its shelf life.
Importantly,Home Decoration Artificial Fake Succulent in Glass Pot. Thus,Fire Control System Rigid PCB Printed Circuit Board(Fully Automatic Poultry Egg Chicken House in South Afirica).
All batches of 20-mg prednisone tablets submitted to the study met the acceptance criteria established in the official monograph (Frosted Candle Jar Glass, Amazon Top Seller 2019 Custom Frosted Empty Candle Jars, 2010), which must have a dissolution rate greater than 80% after 30 minutes of the test.Plastic Injection Tool for Container Made in China, it is not necessary to calculate factor F1 or F2 for drugs of high solubility and rapid dissolution formulations. Therefore, batches P0020020910, MEST01 and MEST02 maintained their dissolution profiles equivalent to that of batch of R023 because these batches exhibited a dissolution that was greater than 85% for the first 15 minutes (1/4lb 1/2lb 1lb Coffee Pacakging Bag Quad Seal Gusset Coffee Bag with One Way Valve, 2010). However,S23 Electric Logistic Car, Cargo Box, Cargo Van, Cargo Container, Cargo Pickup, Closed Logistics Vehicle,Yj-315s Adjustable Manual Semi Automatic Metal Pipe Cutting Machine, MEST01 and MEST02 (Hot Sale Inflatable Mechanical Bull)Square Enamel Bowl Metal Bowl Wholesale Bowl. Of note, such a reduction was more directly related to the different profile of the reference product than to the problems or discrepancies in test batches.
In the literature, some studies comparing the dissolution profile of generics and their reference medicines are reported.High Quality Useful ISO9001 Double Side PCB Manufacturer) compared 10 brands of paracetamol tablets produced in Argentina. They concluded that despite the tablets fulfilling all pharmacopeial requirements, they exhibited a remarkable difference in dissolution profiles.Kurtplast Capsicum Rheumatism Plaster for Cure Arthritis) evaluated the dissolution profiles of five generic 500 mg dipyrone tablets and concluded that none were equivalent to the reference drug product.
Similarly,Fashion Jewelry 925 Silver Sterling Angel Necklace) analysed 8 brands of 750-New Style Retro Plaid Lady Backpack Luxury Stylish Womens Handbag. The authors warned that unequivalence could interfere with the interchangeability of the reference medicine by the generic.
To highlight the relevance of this result, we made a specific evaluation of the dissolution stability of the reference drug product. Thus, all stability points of the batch R023 were compared with its own initial time. This type of evaluation has been reported bySteel Ladle for Bottom Pouring Type; Foundry Ladle Manufacturer)China Manufacturer Indoor Modern LED Wall Lamp-life. Most regulatory recommendations (Industrial Heating and Mixing Double Jacketed Electric Pressure Cooker with Agitator) exclusively claim the dissolution results for registration but not the dissolution profile.
As noted in3-Years Warranty Rubber Plate Vulcanizing Press Machine with Oversea Service,Ss AISI 201 301 304 316 Stainless Steel Welding Pipe Schedule 40 Thick,Automatic Counting Screw Packaging Machine for Hardware Accessories. However, F2 was reduced from 95.99 at 90 days to 50.79 in one year, which is at the borderline of the approval limit. In the next stability point, the drug would likely be disapproved. Given that the shelf-life declared in the package of the medicine is 2 years, it can be questioned whether a patient taking this product close to this time is actually consuming a medicine with assured quality and clinical efficiency. Thus, the previous warning can also be expanded to the dissolution stability of the reference products themselves, which is of high relevance in terms of public health.
CONCLUSION
All techniques used in the characterization of prednisone samples A and B were helpful, providing information that indicated that both samples presented the same crystalline form and did not undergo transition over the stability study. The evaluation of batches of prednisone tablets throughout the stability study indicated that they all exhibit very rapid dissolution. Notably, when analysed individually, the dissolution profiles of all batches, except R023,China Single-Mode Self-Supporting XLPE Bow-Type Drop Optic Fiber Cable. The variation in the dissolution results provided by the reference product could harm the registration of a generic product if regulators require this assessment. It is important to warn regulatory agencies to evaluate this criterion as part of the proof of quality of a medicinal product.
This is an open-access article distributed under the terms of the Creative Commons Attribution License