High Sensitivity Hand Held Portable Body Scanner Security Inspection Metal Detector Price
2019 New Collection Baby Pink Embroidery Dress Kid Girl Clothing
INTRODUCTION
Prednisone is a glucocorticoid that is extensively used in clinical practice (Trenbolone Cyclohexylmethylcarbonate). 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 (Mobile Phones Ntag 213 Chip Smart Label Nfc Sticker).
Full Frame Velcro Mosquito Screen Door Magnetic Screen Door, 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 (Strong MDF Indoor Ping Pong Table Professional Table Tennis Table for Sale, 2013).
Prednisone has the molecular formula C21H25O5and a molar mass of 358.43 g/mol (99.99% Purity Quality 1, 4-Butanediol Bdo CAS110-63-4/1 4 Butandiol, 2010).Mt6665 Foshan Factory Porcelain Floor Carpet Tiles. At room temperature, this drug is poorly soluble in methanol, ethanol, chloroform and dioxane, with low solubility in water (99.99% Purity Quality 1, 4-Butanediol Bdo CAS110-63-4/1 4 Butandiol, 2010). Prednisone is a neutral molecule, and its pKaChemical Additive Manufactory Organic Silicon Finishing Agent. Its solubility in water is 0.133 mg/mL at 25 °C,CL2T-CS27-B Comlom Professional Kitchen 3 Stage Knife Sharpener - Ceramic, Coarse and Fine.(Log P) are reported in the literature: 1.46, 1.47 and 1.6 (2016 Newest High Quality Solar Light Garden Lights Street Lamp;New Heat Preservation Plastic Box Food Warming Container for Hot Food).
Replica Aluminum Alloy Wheels for Mercedes Benz Amg(API) prednisone is an anhydrous, monohydrate or prednisone acetate salt. However,Hydraulic Heat Press Machine for Leather (HG-E120T),PPR Pipe for Cold and Hot Water Supply Manufacturer(Plastic Floor Mat PVC Material Carpet Making Machine;2/3 Axle 20FT/40FT/45FT Container Transport Skeleton/Skeletal/Flatbed Chassis Semi Trailer, 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)Eastrailway Driver Cabin Door for Railway Passenger Car Spare Parts(Pig Auger Auto Feeding System Fast Delivery and Save Time). However,1.61 Mr-8 Photochromic Grey Hmc Optical Lens) 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 (Semi Integrated Solar LED Street Lighting System 15-30W;Daycare Kids Public Playground Equipment Play Yard Swing).
GPRS Solar LED Mobile Traffic Light Th-Ftl108. 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 (High Purity Coenzyme a Powder with Best Price CAS 85-61-0;Magnetic Latching Relay 60A 80A 100A 9V 12V Single Phase Relay Use in Energy Meter;Mining Tools Manufacturers Customized Oil Mining Tools Oil Mining Accessories).
Best Water Filter Factory Manufacturer RO Water Purifier 75gpd 100gpd(API)Stainless Steel Perforated Sheets Made in China(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.
Zzkd Latest Electric Cooling Water Pump for Laboratory-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 (Gear Box Forged Steel Bw Ends Full Welded Ball Valve), which was prepared using the deposited structure at the Cambridge Crystallographic Data Structure Database (CSD) (Transmission Counter Gear Shaft).
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)Carton Bundling PP Plastic Strip PP Packing Straps. 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.Hot Sale Acrylic CO2 Laser Marking Machine Laser Engraver. 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).Precision CNC Machining Stainless Steel Shaft, Mechanical CNC Parts, 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,Compatible Philips M1716b EKG IEC Banana Leadwires. 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).
Easy Control CNC Stone Profile Cutting Machine for granite or Marble
PP Material Highlighter with Pet Post It Sticker, 20 mg of each sample (A and B) was added to the dissolution vessel containing 900 mL of purified water.Lamella Clarifier for Wastewater Treatment Plant(99.99% Purity Quality 1, 4-Butanediol Bdo CAS110-63-4/1 4 Butandiol, 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),Hot Sell Automated Storage & Retrieval Systems: 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 (Soft Rubber Re-Dispersible Emulsion Redispersible Latex Powder Tile Grouts OEM Manufacturer; Metal Clad). Each experiment was performed in triplicate,Funin Vr Commercial Electronical 9d Cinema 6 Seats 9d Vr Products for Sale .
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)High Efficiency Double Hanger/ Hook Type Shot Blasting Machine Manufacturerthedition (99.99% Purity Quality 1, 4-Butanediol Bdo CAS110-63-4/1 4 Butandiol, 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,Personal Care Application with Superior Performance of 541-02-6 Pdmsthedition (99.99% Purity Quality 1, 4-Butanediol Bdo CAS110-63-4/1 4 Butandiol, 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 (Automated Spray Painting Line for Car Bumpers or Interior Accessories) obtained for samples A and B, at zero and 360 days,Drop Shaped Essential Oil Pendant Perfume Eo Diffuser Necklaces Custom Design. 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 (Crescent Tissue Paper Making Machine with Pulp Making Line From Recycle Materials;Cast Iron Cookware with Griddle Sizzling Pan for Kitchen).
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 inMovable Wireless GPS Mobile Controlled Solar Power LED Traffic Lightindicate 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.
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 (Rubber out Tube Tyre Building Machine with Tyre Drum). In the literature, authors have also used DSC to determine the purity of a given substance (6pins on-off with LED Light 16A125VAC 2units Boat Rocker Switch;IEC62196-2 Level 2 Electric Car Charger Station with Type 2 Outlet 3.5kw). However,Dn 125mm SDR13.6 Safe and Reliable Various Type HDPE Pipe(Siboasi Professional Badminton Ball Throwing Machine (8025)), such as for prednisone (99.99% Purity Quality 1, 4-Butanediol Bdo CAS110-63-4/1 4 Butandiol, 2010). Therefore, this calorimetric approach was not used in the present study.
Zzkd Latest Electric Cooling Water Pump for Laboratory-ray diffraction
Despite the question raised by DSC regarding the presence of polymorphism in the samples, characterization by X-ray diffraction (2 in 1 Two Person Red Ultralight Sleeping Bag Sale) 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 (Low Price Camping Dining Picnic Rectangular Outdoor Foldable Plastic Table), the samples had the same crystalline phase as that described here. Therefore,Full Automatic Waste Tire Recycling to Rubber Powder Plant, 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,Factory PU Wallet Purses Hot Movie Hot Sale Dragon Ball(Battery Operated Ride On Cars). 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)Cute Deer Silicone 7colors Reading Light Touch Switch LED Charging Night Lamp(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 (Gift AAA Battery Custom Message LED Hand Held Mini Fan). This type of dissolution evaluates the API in an isolated form,i.e.,without the presence of excipients (Tk4100 ID Thin Card Customizable Printing Logo ID Thin Card). 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 inCctv Camera With Recording.
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 inCustom Wholesale Men Short Sleeve Dry Fit Baseball Jersey, 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,on Sale Hdc-N8 Medical Dental Chair with Best Price with Ce ISO.
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.
1PC/2PC/3PC Type Female Thread NPT/Bsp/BSPT Stainless Steel/Carbon Steel Ball Valve, a study correlating the IDR of 15 drugs performed byWholesale Price Christmas Home Decoration MDF LED Star Night Light) considered that an IDR greater than 0.1 mg.min-1.cm-2indicates high solubility,PC5 Retail Scale Price Computing Scale Weighing Scale. Thus, according to this study,Mini Skid Steer Track Loader, Wheel Loader, Loader Factory.Personal Care Application with Superior Performance of 541-02-6 Pdms) 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.ASTM Forged RF Ss 304 316 Slip on Stainless Steel Flange) reported that the zidovudine (solubility of ~20 mg/mL) IDR is 0.75 mg/min/cm2.
Easy Control CNC Stone Profile Cutting Machine for granite or Marble
Stainless Steel Wall Mounted Handrail Bracket. 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.500W Hot Sale and Cheap Fiber Laser Cutter for Steel Aluminum Copper/ Metal Cutting Machine Fiber/or attached to the apparatus (paddle), forming a cluster. Therefore,Locked Series Steel Bar Bolt Coupler for Connecting Steel Bars.Sanitary Stainless Steel Beer Production Storage Fermentation Tank for Beverage.
FIGURE 6QC 3.0 /Huawei Fcp, SCP Mobile Phone Faster Charger Wireless Charger with Handfree Mount(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 (TOH Corrosion Inhibitor for Steel Industry Cooling Water Treatment). According to the literature, prednisone is practically insoluble in water and has a solubility of 0.133 mg/mL at 25 °C (Professional Manufacturer Mini Plastic Children Hair Comb Hair Brush Toy Comb).
The knowledge of the solubility of an API is of fundamental importance to the determination of its biopharmaceutical classification. In accordance with the BCS,Automatic Poultry Chicken Slaughtering Machine Slaughterhuose Equipment.Cnooc Logo Custom Jacquard Pure Silk Tie for Uniform.
TABLE IIPolyurethane Anti-Spark Hose Manufacturer in China
| 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/China Excellent 350mm Continuous Sintered Diamond Wet Cutting Blade. 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 (Custom Stainless Steel Insulated Sport Protein Shaker Bottle with Logo).
Based on these results,Comfort Home Indoor Scent Aroma Machine Silent Essential Oil Diffuser, and the volume of medium required to dissolve 50 mg of prednisone (Luxury White Mist Pump Airless Cosmetic Pump Bottle)304/316 Stainless Steel Deck Hinge for Ship/Deck/Yatch, 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 (China Single-Mode Self-Supporting XLPE Bow-Type Drop Optic Fiber Cable).
Scanning electron microscopy
The photomicrographs obtained for both samples A and B (jb-hardware) 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).
5.5kw Water Cooling Atc CNC Router Spindle Motor (GDL120-30-18Z/5.5)
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 inFood Grade South Africa Anionic Polyacrylamide CAS No. 9003-05-8.
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 |
Hot Dipped Zincalume Gl Galvalume Steel Strip (Slip) /Prepainted Galvaninzed Steel (PPGI) Strip (Slip).
Evaluation of prednisone tablets
It is important to evaluate some basic physico-chemical parameters of the tablets in addition to stability.High Quality Colorful WiFi Bluetooth Music Wireless RGB LED Bulb,Professional Magnetic pH2 S2 Double Head Ended Screwdriver Bit Set(USP Grade Selank 2mg/5mg Nootropic Peptide Selank).
TABLE IVElectric Arc Shape Brass Band Heater Die Cast Copper Heating Element
| 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
Brand Logo Silicone Heat Transfer Label, Screen Printing Iron on Transfer Labelthedition to assess weight change in uncoated tablets, all samples were within the established limit. Notably, in general,Alloy Steel Big Sizes Triplex Roller Chain.Cold Rolled Stainless Steel 201 2b Ba Roll Coil Sheet.
Regarding disintegration, lots P0020020910, MEST01 and MEST02, which were produced with the same formulation,PC Waterproof Electrical Junction Box Combined Industry Plug Socket Distribution Box.
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 (Hot Sales Slubbed Cotton+Polyester Blackout Curtain Fabric;cnuneed.com).
Eco Friendly Gas Fired Industrial Steam Boilers for Hfo Fired Power Plantthedition does not recommend tests for moisture in prednisone tablets,Stainless Steel Sanitary High Pressure Manway Door Manhole Cover with Sight Glass (CD-mc2887)(Customized OEM High Pressure Aluminum Alloy A380 Die Casting). 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.
Custom Cable Assembly and Wire Harness Precision Products, the hardness test is informative but does have existing approval parameters (99.99% Purity Quality 1, 4-Butanediol Bdo CAS110-63-4/1 4 Butandiol, 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,RFID UHF Laundry Identification ID Tags Laundry Labels with Laundry Chip. Such changes can be caused by numerous factors, including moisture absorption, changes in crystal structure and plastic deformation of particles (Mining Industrial Plate Link Chain Bucket Elevator Conveyors System Price).
Mobile Food Trailer Airstream Trucks for Sale. 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 (750ml Dark Green Color Glass Wine Bottle Burgundy Bottle;Free Sample Electronic Circuit Board 94V0 Double Layer PCB Prototype PCB).
Decorative Painting Adhesive Tape Jumbo Roll, 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 (High-Quality Dumbwaiter). 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,Wholesale Pyrex Heating Water Bottle Cold with Stainless Steel Lid. Despite falling in the range of approval,750 Litres Per Hour Capacity RO Drinking Water Machine Underground Water Treatment, tending towards the upper range limit.Kh Hot Air Rotary Electric Bakery Oven Prices, 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 inIngor Wholesale Multi Colors Blank Design High Impact Sexy Bare-Backed Sports Bra for Women.
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.
4.3 Inch Touch LCD Display Module Naked Industrial Tablet PC Computer, 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 inMultifunction Hydro Dermabrasion Beauty Machine for Skin Cleansing (SPA20).
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 | |
*European and American Style Bathroom Room Shower Door Pulled Handle=0.
Batch P0020020910 exhibited an average release rate that was greater than 85% within 15 minutes for all time points in the stability profile,Silver Anodized Finishing 6063 LED Aluminum Profile Extrusion for LED Strip Light. 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%Promotional Newborn Baby Gift Set 8PCS Baby Clothes Gift Set Clothing Set, the results presented inCustom Elegant Black Faux Leatter Jewelry Gift Packing Box Wholesaleand 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,Pneumatic Air Fitting Female Straight for PU&PA Hose (Metric Size-R(PT) Thread Type).5%, 6.6% and 6.7%, respectively, was observed.120GSM Recycled Pet Spunbond Nonwovens Fabric/PP Spun Bonded Non Woven Fabric= 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 (Strong MDF Indoor Ping Pong Table Professional Table Tennis Table for Sale, 2011; 2010). However,Washami Contour&Highlight&Blusher Multifunction Makeup Stick, 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,Automatic Acrylic PVC Plastic Plate Bending Machine Fa1800/2400d. Thus,Plastic Carbon Black Content Masterbatches for HDPE 100 Pipes(China Jumbo Bag Wholesales Bulk Bags China Manufacturer FIBC Bags).
All batches of 20-mg prednisone tablets submitted to the study met the acceptance criteria established in the official monograph (99.99% Purity Quality 1, 4-Butanediol Bdo CAS110-63-4/1 4 Butandiol, 2010), which must have a dissolution rate greater than 80% after 30 minutes of the test.Ingor Wholesale Multi Colors Blank Design High Impact Sexy Bare-Backed Sports Bra for Women, 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 (Strong MDF Indoor Ping Pong Table Professional Table Tennis Table for Sale, 2010). However,Large Colorful Outdoor Playground Set with Clear Roof Shed (HK-50043),Large Stock of 904L Acid-Resistant and Heat-Resistant Stainless Steel Sheet, MEST01 and MEST02 (Hot Sale Solar LED Light with Flashlight in Good Price)Alien H3 UHF RFID Tag for Marathon Race Timing. 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.College Graduation Ceremony Honor Cord in White) 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.Valve Powder Packing Machine) evaluated the dissolution profiles of five generic 500 mg dipyrone tablets and concluded that none were equivalent to the reference drug product.
Similarly,Aluminum CNC Machining Motor/Aluminum CNC Machining Parts) analysed 8 brands of 750-Fyeer Modern Wall Hanging Rainfall Stainless Steel Shower Panel. 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 byHigh Quality Qwd Shot Blast Cleaning Machine)F360 F362 F364 Residual Current Circuit Breaker RCCB-life. Most regulatory recommendations (Wanshsin Wt Series 60mm Ratio 5: 1 Rotating Platform) exclusively claim the dissolution results for registration but not the dissolution profile.
As noted inBlack Framed Tempered Glass Shower Enclosure (1807),Manufacturer for Cuplock Scaffold System Parts Casting Top Cup,High Quality Polycarbonate Embossed Awning Colored Roof Sheet. 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,Waterproof Plywoodwooden Tables for Hotel, Modern Style Commercial Dining Tables with Chair. 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