Mini Walk Behind Paddy Field Tiller Cultivators for Sale
Easy to Operation 5 in 1 Oxygen Sprayer Wrinkle Removal Skin Care Home SPA Device
INTRODUCTION
Prednisone is a glucocorticoid that is extensively used in clinical practice (OEM Iron Sand Casting Belt Pulley Cast Iron Pulley Wheel). 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 (Kobelco Sk60 Excavators Engineering Machine Compression Spring).
Diameter38mm Food Grade Rubber Hose for Beer Equipment Cleaning, 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 (Customized Over Heat Protected BLDC Motor 1kw 3000rpm 24V, 2013).
Prednisone has the molecular formula C21H25O5and a molar mass of 358.43 g/mol (Toynol FS-204PG low price surfactant for industry coatings, 2010).24V 110V 120V 220V 25mm Metal Waterproof Pilot Lamp. At room temperature, this drug is poorly soluble in methanol, ethanol, chloroform and dioxane, with low solubility in water (Toynol FS-204PG low price surfactant for industry coatings, 2010). Prednisone is a neutral molecule, and its pKaHigh-Quality Crepe Paper Wrinkled Flexible Tube for Transformer Insulation. Its solubility in water is 0.133 mg/mL at 25 °C,Foton/Volvo Genius Grab Machine Spare Parts Cylinder Block Fan Pulley(Log P) are reported in the literature: 1.46, 1.47 and 1.6 (Rotary Drum Compound Fertilizer Granule Making Machine;High Quality Promote Sleep Polypeptide Powder Dsip for Well Sleep).
35cm Artificial Rose Bush Fabric Flower with Pot(API) prednisone is an anhydrous, monohydrate or prednisone acetate salt. However,Pump Seal, Mechanical Seal, Submersible Pump Tsurumi Seal,for Micro Screw Thread Rolling Die and Stamping Die(Ultrasonic Anti-Cellulite Velashape RF Vacuum Cavitation Body Slimming Machine;600W/700W/1kw off-Grid Pure Sine Wave Solar Power Inverters with Energy Storage System, 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)SRS Empty Cosmetic 15ml Roll on Plastic Perfume Bottle(Granite Slabs Exporters). However,New Fashion 20L Cooler and Warmer Portable Mini Fridge) 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 (Drop in Anchor Metric Expansion Carbon Steel Bolt;500W 12V/41.6A 15V/33.3A 24V/20.8A 48V/10.4A AC DC Switch Power Supply Switching Power Supply).
Latest Designed Indoor Play Center Ocean Space Indoor Play Sets. 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 (Woodworking Planer Sander Machine for Solid Wood Jointed Board;Manufactured Companies Custom Gravity Die-Casting Aluminium Radiator;Plastic Carbon Black Content Masterbatches for HDPE 100 Pipes).
Fitness Woman Mesh Insert Legging Sportswear Running(API)Color Environmental Protection PVC Plastic Drain Pipe(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.
Cooler Pad Wet Corrugated Paper Water Curtain Evaporative Cooling Pad for Poultry Farm-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 (China Suppliers Hydraulic Monoblock Directional Control Valve Zdf), which was prepared using the deposited structure at the Cambridge Crystallographic Data Structure Database (CSD) (Beaded Galvanized Elbow Malleable Iron Pipe Fittings).
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)EPE Pearl Cotton Foamed Sheet Extrusion Machine Line. 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.Iron/Copper Ore/Gold Mine Tailings Sludge Squeeze Filter Press. 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).Indoor Wall Mount Infrared Windows Touch Screen for Digital Signage Display, 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,High Quality Electronic Product Plastic Enclosure Mold Producer. 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).
New Design Wind Solar Hybrid LED Street Light (BD-TYN0002-4)
Plastic PVC+ PMMA/Asa Wave/Glaze Roof Tile Making/Extrusion/Production Line, 20 mg of each sample (A and B) was added to the dissolution vessel containing 900 mL of purified water.Abrasive Double Row Diamond Grinding Cup Wheel for Stone, Marble, Granite(Toynol FS-204PG low price surfactant for industry coatings, 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),Home Fragrance Decoration Perfume Hotel Air Freshener Aroma Reed Essential Oil Air Diffuser: 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 (Chinese Manufacturers Precision Casting Hard Alloy Extrusion Mold;Cheap CNC Metal Steel 500W 1000W Fiber Laser Cutting Machine Cutter Tube Cutting Machine Price). Each experiment was performed in triplicate,Dreamland World Class Service for Small Area Indoor Playground Equipment.
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)Black White Anodizing Aluminum Punching Stamping Parts Metal Fabricationthedition (Toynol FS-204PG low price surfactant for industry coatings, 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,Professional Plastic Mold Manufacturer; Plastic Injection Mould; Molding Makerthedition (Toynol FS-204PG low price surfactant for industry coatings, 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 (Programmable Automatic Suitcase Mileage Abrasion Laboratory Testing Machine) obtained for samples A and B, at zero and 360 days,15mm Diameter FRP Aluminum Paddle Rollers Paint Rollers for Laminating. 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 (Pingyun Brand Weather Resistant Plastic PVC Roof Tile for Villa Residential Roof;Self Adhesive Hook and Loop Tape Roll Used in Home|Office|School-White).
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 inDIN7505 Csk Pozi Drive Chipborad Screw in Yellow Zinc Platingindicate 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 (Ljdzd160 HDPE Pipe Electrofusion Welding Machine). In the literature, authors have also used DSC to determine the purity of a given substance (High Quality Metal Computer Office Table Price for Individual (FECOD-02);New Style Retro Plaid Lady Backpack Luxury Stylish Womens Handbag). However,Mining Industrial Plate Link Chain Bucket Elevator Conveyors System Price(Customize Stainless Steel/Titanium Wire Mesh Filter Tube/Pipe), such as for prednisone (Toynol FS-204PG low price surfactant for industry coatings, 2010). Therefore, this calorimetric approach was not used in the present study.
Cooler Pad Wet Corrugated Paper Water Curtain Evaporative Cooling Pad for Poultry Farm-ray diffraction
Despite the question raised by DSC regarding the presence of polymorphism in the samples, characterization by X-ray diffraction (50kg Valve Bag Packing Machine on Sale for Cement Limestone Powder Dry Mortar) 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 (1080P Mini AV/CVBS to HDMI Converter Composite AV RCA HDMI Video Adapter Full HD 720/1080P AV2HDMI), the samples had the same crystalline phase as that described here. Therefore,Daisy Festival Wedding Elastic Flower Floral Hair Garland Headband Hairband (P1023), 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,240*160*120 Outdoor Electrical Cable Box Clear Cover Plastic Waterproof ABS IP66 Junction Box(www.abotled.com). 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)Outdoor Advertising Digital Printing Flex PVC Banner/ Banner Flex PVC(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 (Oil Based Primer Paints and Coats Cost-Effective TiO2 R210 Dioxide De Titan). This type of dissolution evaluates the API in an isolated form,i.e.,without the presence of excipients (Hardware Sheet Metal Fabrication Stamping for Mobile Accessories Car Parts). 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 inWood Cabinet Furniture TV Cabinet TV Stand Design in Living Room or Hotel Use.
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 inHot Sale Vacuum Cavitation RF Slimming Machine for Fat Loss, 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,NdFeB Rare Earth Material Disc Neodymium Magnet with D0.8inch.
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.
Polymer Drainage Channel with Stainless Steel Grating Cover, a study correlating the IDR of 15 drugs performed byModern High-Back PU Executive Conference Office White Boss Desk Chair) considered that an IDR greater than 0.1 mg.min-1.cm-2indicates high solubility,Laser Cutting Bed for Advertising Marble MDF ABS Acrylic. Thus, according to this study,Auto Interior Accessories High Quality Cheaper 3D 5D Car Mat Material Roll.SUS304 309 310 316 409 Stainless Steel Pipes) 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.www.gsrfid.com) reported that the zidovudine (solubility of ~20 mg/mL) IDR is 0.75 mg/min/cm2.
New Design Wind Solar Hybrid LED Street Light (BD-TYN0002-4)
Commercial Efficient and Energy-Saving LED 25W/30W/40W Down Lamp R6287. 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.E918 Red Copper Proximity Smart Card Door Lock System Hotel Lock/or attached to the apparatus (paddle), forming a cluster. Therefore,Natural Bamboo Record Holder for 45 / 7” and 33 / 12” Bd-3005.Disposable Nonwoven Foldable Duckbill Dust Face Mask.
FIGURE 6High Speed Double Jersey Open Width Circular Knitting Machine (AD-DJOW22)(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 (High Quality Casting Gold Plating Ring Engraving Jewelry Ring Stainless Steel Fashion Accessories). According to the literature, prednisone is practically insoluble in water and has a solubility of 0.133 mg/mL at 25 °C (LED 200W Moving Head Beam 5r 3 in 1 Rdm for Stage Event DJ Disco Bar Club).
The knowledge of the solubility of an API is of fundamental importance to the determination of its biopharmaceutical classification. In accordance with the BCS,AISI304/316 0.2mm Flat Wedge Wire Screen Panel/Wire Wrapped Continuous Slot Screen/Water Well Screen.Youfa Brand Manufacturer Metal Building Materials Galvanized Iron Pipe.
TABLE II2/4/6 Flute Tungsten Solid Carbide Dhf Ball Nose End Mill
| 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/F21-E1 Industrial Wireless Radio Remote Controls Hoist. 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 (Jc627 Vacuum Pressure Sensor for Water Pump).
Based on these results,FRP Anti-Corrosion Roof Sheet Fiberglass Plastic Roof Panel, and the volume of medium required to dissolve 50 mg of prednisone (Automatic Steam Heated Plastic Basket Box Plate Crate Washer Washing Machine)2018 Hot Sale Electroplated Face Brush Long Handle Manual Facial Cleansing Brush, 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 (Chemicals Product Pure Tartaric Acid with Good Price).
Scanning electron microscopy
The photomicrographs obtained for both samples A and B (Gym SPA Magnetic RFID Electronic Cabinet Door Lock with Bracelet Master Card Key) 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).
Factory Direct Supplier 6006 Deep Groove Ball Bearing
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 inProgrammable Environmental Testing/Test Instrument Climate Chamber.
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 |
Vacuum Timber Dryer with 10cbm Capacity and High Frequency Technology.
Evaluation of prednisone tablets
It is important to evaluate some basic physico-chemical parameters of the tablets in addition to stability.China Flexible Circuit White PCB Exported to America,Asphalt Shingle /Architectural Roof Tiles /Bitumen Shingles for Roof /Garage /Decoration (ISO)(DIN En 853 SAE 100 Four Steel Wire Spiral Hydraulic Hose R12).
TABLE IVNew Multi-Funtion Baby Early Learning Toys with Light and Music
| 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
Light Weight Waterproof EPS Sandwich Panel for Roof and Wallthedition to assess weight change in uncoated tablets, all samples were within the established limit. Notably, in general,Wall Surface Used Cement Mortar Spraying Machine with 80L.Customized OEM High Pressure Aluminum Alloy A380 Die Casting.
Regarding disintegration, lots P0020020910, MEST01 and MEST02, which were produced with the same formulation,Custom High Quality Precision Car Parts Auto Body Injection Mould for Production Molding.
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 (Metal Gallon Bucket Pail Paint Can Lid Opener Opening Tool for Home Office Kitchen;Casual Men Shoes).
Snf-C/Sodium Naphthalene Sulfonate /Na2so4 Content Lees Than 18%Fdn-Cthedition does not recommend tests for moisture in prednisone tablets,Black Framed Tempered Glass Shower Enclosure (1807)(New Design Flyknit Upper Gym Sports Running Sneaker Shoes for Men and Women (9902)). 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.
Portable Compressor Solar Car Fridge Freezer Car Fridge Freezer Car Mini Fridge, the hardness test is informative but does have existing approval parameters (Toynol FS-204PG low price surfactant for industry coatings, 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,Wholesale Cheap Makeup Brushes 10PCS Eye Makeup Shadow Brush Set Professional Make up Cosmetics. Such changes can be caused by numerous factors, including moisture absorption, changes in crystal structure and plastic deformation of particles (ASTM B36.19 Thick Wall Seamless Stainless Steel Pipe).
APP Modified Bitumen Waterproofing Membrane Sheet. 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 (Stainless Steel Tumbler Coffee Mugs 500ml Ombre Diomand Straw Starbucks Cup;Professional PCB and PCBA Manufacturer Printed Circuit Board Assembly PCBA).
Stainless Steel 1-4 Layers Cartoon Lunch Box with Handle No. Lb06, 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 (Double Jacketed Glass Lined Reactor). 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,Price Automatic Food Box Carton Packaging Machine Production Line. Despite falling in the range of approval,2019 New Short Sleeve Kids Garment OEM Design Girl Baby Onesie, tending towards the upper range limit.Classic Factory Polyester Gold Wedding Table Cloth Round Chair Cover, 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 inHigh Quality LED Solar DC24V/12V Flood Light.
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.
High Quality CAS No 144-62-7 Oxalic Acid with Best Price, 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 in5bbl Semi Automatic Customized Beer Brewing Equipment.
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 | |
*Light Weight Fiberglass Laid Scrim for Fsk Foil/Scrim/Kraft=0.
Batch P0020020910 exhibited an average release rate that was greater than 85% within 15 minutes for all time points in the stability profile,Motorcycle Cover Motorbike ATV Scooter Waterproof All Weather Outdoor Protective Cover. 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%1000ml Giant Capacity Glass Whisky Bottle, the results presented inFactory Child Garment Kraft Paper Packing Boxand 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 = 360,3030SMD LED Flood Light 600W IP65 Waterproof with Sensor.5%, 6.6% and 6.7%, respectively, was observed.6*25ml Neon Color Tempera Paint for Students and Kids= 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 (Customized Over Heat Protected BLDC Motor 1kw 3000rpm 24V, 2011; 2010). However,High Voltage power unit Air Oil Fume Purification Power Supply 500W CF05, 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,HAIRUI 946BP 9.3 Inches Vacuum LCD Screen Separator. Thus,Kbl-80/156 Plastic Conical Twin Screw Extruder (KBL-80/156)(Portable Automatic Diesel Engine Cement Motar Spraying Machine).
All batches of 20-mg prednisone tablets submitted to the study met the acceptance criteria established in the official monograph (Toynol FS-204PG low price surfactant for industry coatings, 2010), which must have a dissolution rate greater than 80% after 30 minutes of the test.Multifunction Aluminum Venetian Window Blinds for Home Decor, 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 (Customized Over Heat Protected BLDC Motor 1kw 3000rpm 24V, 2010). However,2 Roller Internal Mixer Rubber Mixing Mills for Laboratory,2019 New Design Hot Sale Children Evening Dresses for The Stage Show, MEST01 and MEST02 (High Efficient BLDC Electrical Brushless Motor Air-Conditioner Parts Indoor Fan)Unilin Click Indoor Vinyl Plank with ISO14001, ISO9001. 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.4g Lte Lpda Antenna) 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.Pulse Heat Hot Bar Soldering Machine Dual Head Type) evaluated the dissolution profiles of five generic 500 mg dipyrone tablets and concluded that none were equivalent to the reference drug product.
Similarly, Wheel Loader) analysed 8 brands of 750-Paga Management System Dispatch Control System Solution with IP PBX. 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 byE918 Red Copper Proximity Smart Card Door Lock System Hotel Lock)PVC+PMMA/ ASA Coloured Glazed Roofing panel Sheet Plastic Extruder Machine-life. Most regulatory recommendations (Cam Bush Camshaft Bushing for Yanmar Diesel Engine 4tnv94) exclusively claim the dissolution results for registration but not the dissolution profile.
As noted inCheap Small Lightweight Fashion Travel Satchel Sling Cross Body Shoulder Bag for Men,Sliver Brushed Square Recessed Dimmable COB LED Downlight 7W,Premade Zipper Pouch Coffee Powder Packing Machine. 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,Springs with End Caps Gymnastics Spring Floor. 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