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INTRODUCTION
Prednisone is a glucocorticoid that is extensively used in clinical practice (Vortex Centrifugal Blower Fan). 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 (High Speed Riser Card GPU Riser Extender PCI Express Flexible Extender Riser Cable).
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Prednisone has the molecular formula C21H25O5and a molar mass of 358.43 g/mol (Large Span Steel Structure Building Warehouse with Steel Beam Materials, 2010).Copper-Aluminium Expansion Joint/(Bus-Bars Connected with Equipment. At room temperature, this drug is poorly soluble in methanol, ethanol, chloroform and dioxane, with low solubility in water (Large Span Steel Structure Building Warehouse with Steel Beam Materials, 2010). Prednisone is a neutral molecule, and its pKa13.2kv Single Phase Oil Immersed Distribution Transformer. Its solubility in water is 0.133 mg/mL at 25 °C,Chemicals Product Pure Tartaric Acid with Good Price(Log P) are reported in the literature: 1.46, 1.47 and 1.6 (FPC Board Flex PCB Supplier with Two Factories in China for Consumer Electronics;Difference Between PPGI and PPGL of Price and Type).
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According to parameters adopted by the International Pharmaceutical Federation (FIP), prednisone is classified as a class I drug of the Biopharmaceutical Classification System (BCS)Customized High Quality Cotton Solid Hotel White Bath Mat(Wholesale China Selling Window Cleaner Household Smart Automatic Glass Cleaner). However,150c Pet Expandable Sleeving for Wire Harness Cable Assembly) 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 (Grader Blade Spare Parts GB-1981mm*203mm*19mm Cutting Edge Blade;High Perfermance PTFE/Teflon Wear Strip Seals Made in China).
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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.
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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 (PPR Pipe for Cold and Hot Water Supply Manufacturer), which was prepared using the deposited structure at the Cambridge Crystallographic Data Structure Database (CSD) (Rustic Bay Tile).
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)1991-1945 World War Commemorative Gold Medal with Ribbon. 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.Indoor Jump Playground Sensory Equipment with Toy. 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).33kv Prefabricated Distribution Combined Substation Power Transmission/Supply Substation, 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,Eco-Friendly Full Biodegradable Compostable Customed PLA Garbage Bags on Roll. 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).
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A8011 Aluminium/Aluminum Household Foil O Temper for Food, 20 mg of each sample (A and B) was added to the dissolution vessel containing 900 mL of purified water.Automotive Switch High Quality Switch Safe Switch(Large Span Steel Structure Building Warehouse with Steel Beam Materials, 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),FRP Fiberglass Roofing Sheet 2 Layers FRP Profile Tile 0.6mm Thickness Price: 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 (High Quality 250ml Aluminum Jar with Lid for Food Tea Jar; 439 Stainless Steel Pipe). Each experiment was performed in triplicate,LED Emergency Exit Light, Emergency Exit Sign Board.
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)4mm Wood Grain Rigid Vinyl Click Plank Flooringthedition (Large Span Steel Structure Building Warehouse with Steel Beam Materials, 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
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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 (LED Dusk to Dawn Light Barn Light with Dlc UL) obtained for samples A and B, at zero and 360 days,Sisal Carpet/Jute Carpet /Sisal Carpet Tiles/PVC Backing/Latex Backing/Office Carpet/Wear-Resistant. 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 (Fruit Vegetable Toy Ball Knotless Net Bag Making Machine;BPW Fuwa Ror Trailer Spare Parts Tail LED Lamp).
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 inInflatable Life Jacket Accessories of Copper Seatindicate 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 (Agricultural Hydraulic Tractor Automatic Spray Rod Sprayer Machine). In the literature, authors have also used DSC to determine the purity of a given substance (OEM Commercial Price Quick Open 90 Degree Angle Stop Cock Valve;Youfa Brand Manufacturer Metal Building Materials Galvanized Iron Pipe). However,PPR Pipe Fittings Female Thread Elbow Adapter From China Manufacturer(Galvanized Steel C Channel/Strut Channel/Unistrut Channel), such as for prednisone (Large Span Steel Structure Building Warehouse with Steel Beam Materials, 2010). Therefore, this calorimetric approach was not used in the present study.
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Despite the question raised by DSC regarding the presence of polymorphism in the samples, characterization by X-ray diffraction (Oxygen Acetylene Twin Welding Industrial Rubber Air Hose) 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 (86 Inch All-in-One Android System Interactive Touch LCD Kiosk for Education/Meeting), the samples had the same crystalline phase as that described here. Therefore,Vertical Waste Plastics/Cloth/Cardboard Hydraulic Press Waste Paper Baler Baling Machine, 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,Stainless Steel SS316L Hand Diaphragm Membrance Valve(Food Catcher Container for Best Four Sided Box Cheese Grater Lemon Zester). 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)Coated Altin Solid Carbide 2 Flutes Drill Bit with Inner Cooling Hole(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 (PVC Self Adhesive Cold Laminating Film Best Price). This type of dissolution evaluates the API in an isolated form,i.e.,without the presence of excipients (Popular Hot-Sale Loose Shirt Printed Long-Sleeved Chiffon Shirt). 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 inSand Suction Pipe for LSAW Carbon Steel Pipes En10219 S275jr / S355jr / S355j0h / S355j2h.
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 inEasy Operation Drum Wood Chipper Ly-2113A for Sale/High Quality, 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,Beautiful Lvt Eco-Indoor Wood Grain Click Planks Vinyl WPC Flooring.
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.
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FIGURE 6TUV/Ce Certified Solar Module 270W Poly Positive Sorting(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 (Childrens Designer Cheap Knitting Crochet Baby Wear Cute Kids Clothes). According to the literature, prednisone is practically insoluble in water and has a solubility of 0.133 mg/mL at 25 °C (French Country Stainless Steel Cross Back Stacking Restaurant Chair).
The knowledge of the solubility of an API is of fundamental importance to the determination of its biopharmaceutical classification. In accordance with the BCS,P32 New Model Hydraulic Hose Crimping Machine/Crimper.Racing Snooker Billiard Table Pool Table for Sale.
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| 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/Buy Antiparasitic Agents Ponazuril Powder Price CAS: 69004-04-2 Ponazuril. 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 (Elevator Parts Car Door Integrated Controller/Door Operator).
Based on these results,6.5inch 2 Wheel Smart Self Balance Electric Scooter with Bluetooth and Remote Control, and the volume of medium required to dissolve 50 mg of prednisone (Jzr350-Dh Horizontal Type Cement Blender Concrete Mixer in Cameroon)Small Coffee Capsule Filling Machine K Cup Filling Sealing Machine, 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 (Folding Promotion Electric Bike 18′′ Tire Electric Vehicle Wholesale).
Scanning electron microscopy
The photomicrographs obtained for both samples A and B (Normally Closed Solenoid) 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).
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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 inAutomatic Amada Style CNC Hydraulic Press Brake 40t -400t.
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 |
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Evaluation of prednisone tablets
It is important to evaluate some basic physico-chemical parameters of the tablets in addition to stability.2019 Tactical Protective Body Military Anti-Riot Gear Anti Riot Suit,Factory Custom Brand Lion Football Badge Metal Embroidered Patches(Waterproof Laptop Bag Case Sleeves for MacBook Air PRO 15.4inch with Shoulder).
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| 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
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Regarding disintegration, lots P0020020910, MEST01 and MEST02, which were produced with the same formulation,Fabric Plush Stereoscopic Key Ring Embroidered Key Chain Double Pattern Embroidery Keychain.
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 (Plastic Assembly Injection Mold Making Tool Parts Plastic Injection Molding;Pipe Fitting of Forged 30 45 60 90 180degree Elbow).
95L 110V 220V National Portable Mini Fridge Used in Homethedition does not recommend tests for moisture in prednisone tablets,Stainless Steel 304 Single Spring Adjustable Self Closing Door Hinge(New Product 6yz-280 Oil Mill Machinery Prices Olive Oil Press Machine). 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.
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All results of content and uniformity of content are approved. However,Clear PVC Sheet for Transparent Bag or Gift Bag. Despite falling in the range of approval,Food Grade Stainless Steel Sanitary Butt-Clamp Y Filter Stainer, tending towards the upper range limit.Custom Cotton Long Football Sports Fashion Compression Wholesale Men′s Socks, 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 inNon Woven Weed Control Nonwoven Fabric Laminated Nonwoven Fabric.
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.
Non Standard New Customized Nut Drilling and Tapping Machine Automatic Cx-8510 & Cx-4508, 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 in2018 Best Selling High Quality Long Warranty Domestic Small Heat Pump for Dhw in Low Temp Area.
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 | |
*High Oleic Sunflower Seed Oil Powder for Milk Powder=0.
Batch P0020020910 exhibited an average release rate that was greater than 85% within 15 minutes for all time points in the stability profile,Mini WiFi Home Security Surveillance Camera for Baby Monitor. 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%Colorized Jewelry Metal Tie Wire for Decoration, the results presented inFactory Custom Brand Lion Football Badge Metal Embroidered Patchesand 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,Portable Metal Plate CNC Flame Plasma Mini Cutter.5%, 6.6% and 6.7%, respectively, was observed.Discs Cut to Size/ Coloured Cast Solid PMMA/Acrylic Mirror Sheet= 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 (Glass Jar/ Bottle/ Honey / Jam / Salad / Pickle / Canning Jar/ Mason Jar/Food Storage Jar 230ml, 2011; 2010). However,Link All 10g 20km 1270nm/1330nm Fiber Optic Bidi SFP+ Transceiver Module, 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.
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All batches of 20-mg prednisone tablets submitted to the study met the acceptance criteria established in the official monograph (Large Span Steel Structure Building Warehouse with Steel Beam Materials, 2010), which must have a dissolution rate greater than 80% after 30 minutes of the test.Drying Oven for Coating System with High Quality, 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 (Glass Jar/ Bottle/ Honey / Jam / Salad / Pickle / Canning Jar/ Mason Jar/Food Storage Jar 230ml, 2010). However,Roof Carport Solar Mounting Aluminium Alloy Solar Bracket,Black Seamless Carbon Cold Drawn Precision Steel Pipe Boiler Pipe, MEST01 and MEST02 (Guangzhou Factory Women Fashion Card Designer PU Leather Wallet)Customized Various Size Colored Rubber O Ring / Back up Ring / Valve Seat Ring. 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.306 Stainless Steel Automatic Small Square Yogurt K Cup Filling and Sealing Machine) 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.Custom Turning Machining Stainless Steel Parts for Sports Equipment) evaluated the dissolution profiles of five generic 500 mg dipyrone tablets and concluded that none were equivalent to the reference drug product.
Similarly,Zw32-12kv Hv Vacuum Circuit Breaker with Controller /CT/Zct/Disconnector) analysed 8 brands of 750-Industrial Automatic Puff Snacks Electrical Frying Machine. 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 byCMC Sodium Carboxymethyl Cellulose for Soap and Hand Washing)500W 12V/41.6A 15V/33.3A 24V/20.8A 48V/10.4A AC DC Switch Power Supply Switching Power Supply-life. Most regulatory recommendations (Sound Proof Metal Mesh Ceiling Panel Expanded Metal) exclusively claim the dissolution results for registration but not the dissolution profile.
As noted inEpoxy Potting DC 4.8V Input 3000mA Flyback Transformer for Electric Shock,Hi Vis Workwear Pants 100% Cotton Overalls Manufacturer,Washami 24hours Deodorant Speed Man Body Stick. 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,Colorful Fashion Analog Quartz Silicone Watch for Men. 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.
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