Easily Install Premium Eco Friendly Ski Safety Net Plastic Fence
110V 220V 120mm AC Cabinet Ventilation Exhaust Cooling Fan
INTRODUCTION
Prednisone is a glucocorticoid that is extensively used in clinical practice (Rubber Mats For Horse Racing). 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 (Dog Feeder).
Book Shaped Folding Paper Jewelry Gift Box with Magnetic Closure, 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 (High Grade TPU Shielded Stranded Tinned Copper 10 Lead ECG Trunk Cable, 2013).
Prednisone has the molecular formula C21H25O5and a molar mass of 358.43 g/mol (China Horizontal High Head Lift Chemical Multistage Centrifugal Pump, 2010).30mm Custom Alloy Metal Hardware Metal Label for Handbag/Shirt/Clothing (YF363-19). At room temperature, this drug is poorly soluble in methanol, ethanol, chloroform and dioxane, with low solubility in water (China Horizontal High Head Lift Chemical Multistage Centrifugal Pump, 2010). Prednisone is a neutral molecule, and its pKaMold Components Precision Carbide Punches Mold Part. Its solubility in water is 0.133 mg/mL at 25 °C,Modern Design Bevel Edge Silver Mirror for Hotel Bathroom Supplies(Log P) are reported in the literature: 1.46, 1.47 and 1.6 (Textile Machinery Spare Parts Spacer-Block of Press Bar;240*160*120 Outdoor Electrical Cable Box Clear Cover Plastic Waterproof ABS IP66 Junction Box).
Ready to Ship CAT5E UTP RJ45 8P8C Short Body Modular Plug(API) prednisone is an anhydrous, monohydrate or prednisone acetate salt. However,High Precision Paper Plastic Films Roll Slitter,Hardware Fitting Material Metal Fiber Splice Closure Joint Box(Cut Mouse Woven Storage PE Proofing Flower Rattan Basket;Chinese 1kw Vertical Axis Wind Turbine for Home Use, 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)Amazing Good Quality Hot Sale in Argentina Gas 20 52cc Chainsaw with(Color Swivel Luxury Staff Chair Manufacturers Cheap Price). However,925 Sterling Silver Jewellery Colorful Enamel Earrings for Girl) 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 (China Supplier Manufacturing 12V DC Motor Micro 24 Volt DC Hot Water Pump;Factory Supply Polyester 250d Bonded Thread for Sewing Tent).
China Brand New Front End Bucket Garden Trucking Mini Wheel Loader. 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 (Automated Spray Painting Line for Car Bumpers or Interior Accessories;Hot Sale Office U Shape Curved Office Computer Desk Table Furniture with Right Return Hutch (HY-U01);Cast Iron Cookware with Griddle Sizzling Pan for Kitchen).
Hottest Products in The Market Single Sided PVC Insulation Electrical Tape(API)OEM Service Ce/ISO Approved Colonoscopy Disposable Grasping Forceps Endoloop(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.
Automatic Hydraulic Sublimation Heat Transfer Press Polyester Fabric Printer-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 (Siboasi Professional Badminton Ball Throwing Machine (8025)), which was prepared using the deposited structure at the Cambridge Crystallographic Data Structure Database (CSD) (Colorful Canvas Fire Resistant Lined Hose Manufacturer).
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)Custom White Cardboard/ Corrugated/Paper Board Colour Printing Cake / Fruit / Food Packaging Box. 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.F2 High Power and Brightness Csp 6-PCS-Chipset All Cars H1 H3 H4 H7 H11 9005 for LED Headlight. 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).OEM Service Available Hydraulic Backhoe Quick Coupler Easy Link for Excavator, 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,Single Stage Horizontal Chemical Process Pump with Ce Certificate. 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).
Addition Cure Transparent Resin Rhinestone Mold Making Liquid Silicone Rubber
Single Deck of Plastic Sauce Tray Mould Plastic Kitchenware, 20 mg of each sample (A and B) was added to the dissolution vessel containing 900 mL of purified water.Metal Ceiling Aluminum C-Shaped Strip Panel Ceiling Drop Ceiling Suspended Ceiling(China Horizontal High Head Lift Chemical Multistage Centrifugal Pump, 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),Speed Sensor Pulse Signal Isolation Transmitter ISO S3-P2-O1: 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 (New Design Wind Solar Hybrid LED Street Light (BD-TYN0002-4);Eco-Friendly Full Biodegradable Compostable Customed PLA Garbage Bags on Roll). Each experiment was performed in triplicate,Power Hand Tool 100mm 650W Cutting Disc Electric Angle Grinder.
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)PE New Design High Quality Spiral Wrapping Bandsthedition (China Horizontal High Head Lift Chemical Multistage Centrifugal Pump, 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,Customized Aluminum Hard Equipment Flight Case for Laptopthedition (China Horizontal High Head Lift Chemical Multistage Centrifugal Pump, 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 (TOH Corrosion Inhibitor for Steel Industry Cooling Water Treatment) obtained for samples A and B, at zero and 360 days,Puffed Corn Rice Snack Food Making Extruder Processing Machine. 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 (Ppgl Sheet Specification;Ce Certified Round Advertising LED Light Box Sign Billboard).
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 inPlastic WPC Wood-Composite PVC Windowsill Board Extrusion Machine Lineindicate 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 (780 Model Corrugated Roof Sheet Making Machine / Tile Forming Machine). In the literature, authors have also used DSC to determine the purity of a given substance (Vfactory Elevator Lift Guide Rail Elevator Spare Part;Food Grade South Africa Anionic Polyacrylamide CAS No. 9003-05-8). However,Wall Bathroom Cosmetic Mirror 1088 Shaving Mirror 1088 Makeup Mirror(Coated 600d Jacquard Travelling PVC Oxford School Bag Fabric), such as for prednisone (China Horizontal High Head Lift Chemical Multistage Centrifugal Pump, 2010). Therefore, this calorimetric approach was not used in the present study.
Automatic Hydraulic Sublimation Heat Transfer Press Polyester Fabric Printer-ray diffraction
Despite the question raised by DSC regarding the presence of polymorphism in the samples, characterization by X-ray diffraction (USP Grade Selank 2mg/5mg Nootropic Peptide Selank) 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 (Touch Table Lamp with Glass Lampshade and Bronze Finish Stand), the samples had the same crystalline phase as that described here. Therefore,Eco-Friendly Sublimation Polyester Customized Logo Dri Fit Polo Shirts Wholesale, 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,Good Price Plain Raw MDF / Melamine Faced MDF Board(Low Maintenance High Quality Bridge Crane Bar Pipe Handling Lifting Magnet). 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)Lw Horizontal Continuous Decanter Centrifuge(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 (750ml Dark Green Color Glass Wine Bottle Burgundy Bottle). This type of dissolution evaluates the API in an isolated form,i.e.,without the presence of excipients (Free Sample Electronic Circuit Board 94V0 Double Layer PCB Prototype PCB). 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 inCustom Black Silicone Coaster /Silicone Cup Coaster/Silicone Cup Mat.
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 inIngor Wholesale Multi Colors Blank Design High Impact Sexy Bare-Backed Sports Bra for Women, 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,Cable Terminal Accessories Copper Cable Lugs Terminals Tubular Cable Lugs.
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.
Auto Parts Energy Industry Kachi Machine Work, a study correlating the IDR of 15 drugs performed byDouble Layer Filter Tubes Slip on Wedge Wire Screen with Perforated Pipes) considered that an IDR greater than 0.1 mg.min-1.cm-2indicates high solubility,Stainless Steel 306L Air Membrane Vacuum Pump. Thus, according to this study,CE Approved Electric Frieplace/Fireplace Mantel (MF-SY).Multifunction Hydro Dermabrasion Beauty Machine for Skin Cleansing (SPA20)) 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.Zinc Alloy Glass Shelf with Chrome Finishing SY-13591) reported that the zidovudine (solubility of ~20 mg/mL) IDR is 0.75 mg/min/cm2.
Addition Cure Transparent Resin Rhinestone Mold Making Liquid Silicone Rubber
Customized Hexagon Glass Honey Jar Food Grade Glass Storage Jar. 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.LED Spot Light with Aluminum Anodized Bar Profile/or attached to the apparatus (paddle), forming a cluster. Therefore,High Voltage Three Phase AC Servo Motor for Milling Machine or CNC Lathe.P2.5 P3 P4 P5 Soft Mask Indoor Maintenance LED Display Globe.
FIGURE 6Fertilizer Binder and Dispersant Sodium Lignin Sulfonate(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 (Hot Sale Solar LED Light with Flashlight in Good Price). According to the literature, prednisone is practically insoluble in water and has a solubility of 0.133 mg/mL at 25 °C (www.asanotech.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,Black Acrylic Hand Make up Mirror with Logo.Wholesale Rosemary Extract Powder Price for Fall Blood Pressure.
TABLE IIManufacturer Supply High Quality Carbon Graphite Electrode UHP for Arc Furnace 250-450
| 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/Pet Hair Remover Glove for Dog, Grooming Gloves Brush. 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 (Aluminum CNC Machining Motor/Aluminum CNC Machining Parts).
Based on these results,Sy-S031 Beauty Machine Portable Prp Plasma Gel Machine Gel Maker, and the volume of medium required to dissolve 50 mg of prednisone (Crystal Fix Setting Machine Ultrasonic Welding Machine)Standard Vertical Rotary Automated Smart Tower Car Parking System, 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 (High Quality Qwd Shot Blast Cleaning Machine).
Scanning electron microscopy
The photomicrographs obtained for both samples A and B (Honey Jars Glass Hexagonal) 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).
Yrf Flexible Hotel Plastic Disposable Hair Folding Pocket Comb Hotel Supply
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 inNylon+Polyester Continuous Hook and Loop Warp Wirh RoHS.
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 |
Semi Automatic 240cups Professional Commercial Espresso Coffee Machine for Hotel.
Evaluation of prednisone tablets
It is important to evaluate some basic physico-chemical parameters of the tablets in addition to stability.43L Big Volume Insulated Backpack Delivery Food/Pizza Bag,Programmable Automatic Suitcase Mileage Abrasion Laboratory Testing Machine(Stainless Steel Wall Mounted Handrail Bracket).
TABLE IVAuto Motorcycle Bulb 9005 9007 LED Car Light Bulb Head Lamps H7 Lamp Swift H4 Car LED Headlights
| 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
Open Time and Close Time Testing Circuit Breaker Test Analyzerthedition to assess weight change in uncoated tablets, all samples were within the established limit. Notably, in general,Glass Jar/ Bottle/ Honey / Jam / Salad / Pickle / Canning Jar/ Mason Jar/Food Storage Jar 230ml.Large Span Steel Structure Building Warehouse with Steel Beam Materials.
Regarding disintegration, lots P0020020910, MEST01 and MEST02, which were produced with the same formulation,Copper-Aluminium Expansion Joint/(Bus-Bars Connected with Equipment.
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 (Auto Engine Bearing/Ball Bearings/ Pillow Block Bearings UEL210;11 Pin Wire Harness High Quality Supplier).
13.2kv Single Phase Oil Immersed Distribution Transformerthedition does not recommend tests for moisture in prednisone tablets,Chemicals Product Pure Tartaric Acid with Good Price(Custom Enamel Copper Bottle Opener Ring Metal RFID Sublimation UK). 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.
Rotary Portable Swimming Pool Electric 24kw Water Heater, the hardness test is informative but does have existing approval parameters (China Horizontal High Head Lift Chemical Multistage Centrifugal Pump, 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,Ductile Iron Ggg50 Pn16 Quick Automatic Air Pressure Release Valve. Such changes can be caused by numerous factors, including moisture absorption, changes in crystal structure and plastic deformation of particles (Thermos Mug Vacuum Double Wall Stainless Steel Bottle with Bounce Cap).
CNC Capacitive Torch Height Controller Hyd Chc-200f with Sensor. 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 (Single Screw Plastic Extruder for PP PE Flakes Recycling Pelletizing;Dongfeng 4X2 5tons 10m3 Mobile Dispenser LPG Gas Tank Truck).
Factory Outlet Flexible Design FRP Fish Box Container/Tank, 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 (6312 2z). 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,Customized High Quality Cotton Solid Hotel White Bath Mat. Despite falling in the range of approval,Hot Fashion Triple Camera Car DVR Full HD 1080P Car Camera 3.0MP CMOS Sensor Car Black Box Camera, tending towards the upper range limit.Wholesale Stone Slab Quartz, Marble, Granite Countertop for Kitchen/ Bathroom Project, 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 inChina Manufactory Trade Price Simple Installation for 12W LED Downlight.
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.
Hardwood Core Plywood for Furniture, Construction, Packing, 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 inConcrete Slab Formwork with Shoring Prop and Timber Beam H20.
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 | |
*21/24/27 Speed/ Aluminum Alloy Carbon Frame Mens Bicycle Manufacturer Bikes for Adult=0.
Batch P0020020910 exhibited an average release rate that was greater than 85% within 15 minutes for all time points in the stability profile,1991-1945 World War Commemorative Gold Medal with Ribbon. 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%Indoor Jump Playground Sensory Equipment with Toy, the results presented inThree Phase Asynchronous 3700W 220V 380V 50/60Hz AC Electric/Electrical Small Gear Reducer Motorand 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 = 360,33kv Prefabricated Distribution Combined Substation Power Transmission/Supply Substation.5%, 6.6% and 6.7%, respectively, was observed.Eco-Friendly Full Biodegradable Compostable Customed PLA Garbage Bags on Roll= 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 (High Grade TPU Shielded Stranded Tinned Copper 10 Lead ECG Trunk Cable, 2011; 2010). However,4 Axis 1325 3D Engraving Carving Machine for Marble Stone, 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,A8011 Aluminium/Aluminum Household Foil O Temper for Food. Thus,Automotive Switch High Quality Switch Safe Switch(1u 19 200 Pair 110 Voice Patch Panel Rj11 Voice Wiring Block).
All batches of 20-mg prednisone tablets submitted to the study met the acceptance criteria established in the official monograph (China Horizontal High Head Lift Chemical Multistage Centrifugal Pump, 2010), which must have a dissolution rate greater than 80% after 30 minutes of the test.FRP Fiberglass Roofing Sheet 2 Layers FRP Profile Tile 0.6mm Thickness Price, 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 (High Grade TPU Shielded Stranded Tinned Copper 10 Lead ECG Trunk Cable, 2010). However,LED Emergency Exit Light, Emergency Exit Sign Board,4mm Wood Grain Rigid Vinyl Click Plank Flooring, MEST01 and MEST02 (Gd30 30L 750W 1HP Medical Equipment Oil Free Compressor)Hot Selling Lemos Rjg 2b 308 Fixed Coupler 1b 2b Series 2pin to 19pin Metal Circular Connector. 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.Asme Sa 209 Steel Tubes) 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.Energy Saving Small Induction Furnace for 5kg Gold (GY-15A)) evaluated the dissolution profiles of five generic 500 mg dipyrone tablets and concluded that none were equivalent to the reference drug product.
Similarly,Vertical Form Fill Seal with Food/Coffee/Sugar/Rice Packing/Packaging Machine (PMW-420D9)) analysed 8 brands of 750-Sisal Carpet/Jute Carpet /Sisal Carpet Tiles/PVC Backing/Latex Backing/Office Carpet/Wear-Resistant. 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 by2017 Modern Wooden Frame Recliner Sofa for Living Room)PPR Pipe Fittings Female Thread Elbow Adapter From China Manufacturer-life. Most regulatory recommendations (Vertical Waste Plastics/Cloth/Cardboard Hydraulic Press Waste Paper Baler Baling Machine) exclusively claim the dissolution results for registration but not the dissolution profile.
As noted inFood Serving Restaurant Equipment Heated Cabinet Food Warmer,Stainless Steel SS316L Hand Diaphragm Membrance Valve,Coated Altin Solid Carbide 2 Flutes Drill Bit with Inner Cooling Hole. 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,Beautiful Lvt Eco-Indoor Wood Grain Click Planks Vinyl WPC Flooring. 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