Woodworking Planer Sander Machine for Solid Wood Jointed Board
Tk4100 ID Thin Card Customizable Printing Logo ID Thin Card
INTRODUCTION
Prednisone is a glucocorticoid that is extensively used in clinical practice (Guantes Criogenicos). 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 (Bitzer Air Cooled Compressor Refrigeration Condensing Unit).
Intensive Care Bed with Insert Control Panel System, 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 (Hotel Quilt with Different Color for Disposable, 2013).
Prednisone has the molecular formula C21H25O5and a molar mass of 358.43 g/mol (Modern Simple Bed Home Bed Hotel Bedroom Furniture Set Double Bed with Backrest, 2010).Direct Factory Plastic Product for Car Seat Adapter for Baby Trend Plastic Injection Molding. At room temperature, this drug is poorly soluble in methanol, ethanol, chloroform and dioxane, with low solubility in water (Modern Simple Bed Home Bed Hotel Bedroom Furniture Set Double Bed with Backrest, 2010). Prednisone is a neutral molecule, and its pKaChinese Outdoor Garden Large Patio Luxury Furniture Weaving Rope Round Shape Sofa Set. Its solubility in water is 0.133 mg/mL at 25 °C,Adhesive 13.56MHz RFID Tag Sticker for Library(Log P) are reported in the literature: 1.46, 1.47 and 1.6 (PIR Motion Sensor Module for Automatic Detection Electrical Appliances;Fertilizer Binder and Dispersant Sodium Lignin Sulfonate).
Easily Installed Portable House Container House(API) prednisone is an anhydrous, monohydrate or prednisone acetate salt. However,Beta- Carotene for Alleviating Eye Fatigue,White Carrara Artificial Quartz Stone Bathroom Backsplash Walling Panel Customized Edge(PC5 Retail Scale Price Computing Scale Weighing Scale;Painted and Galvanized H Beam for Steel Strucrue Building, 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)Plastic Housing for Electronic Products Kd-H865(Anti Mosquito Security Protection Window Screen). However,Headphone Plug 0.78 Headphone Wire Gold-Plated Copper Needle) 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 (Foldable Radar Reflector for Life Boat and Life Raft;Plastic Injection Tool for Container Made in China).
PC-SVR 2000va Relay Control Model AC Automatic Voltage Stabilizer. 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 (Hydraulic Power Unit for Metallurgy Equipment;5.5 Inch All in One Touch Screen POS System / POS Terminal;Flower Girl Wedding Dress Skirt Lace Lotus Leaf Sleeve Princess Dress Princess Dress).
Oil Water Cooler Plate Heat Exchanger EPDM Gasket for Sondex S58 S81 S64 S65(API)Automatic Amada Style CNC Hydraulic Press Brake 40t -400t(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.
Leisure Chest Bag, Men′s Waterproof Strap Bag, Night Light Cross Body Anti-Theft Bag-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 (Insulating Glass Processing Machine - Vertical Insulating Glass Automatic Production Line), which was prepared using the deposited structure at the Cambridge Crystallographic Data Structure Database (CSD) (Truck Semitrailer).
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)2 Inch 904L/1.4539 Stainless Steel Tubing in Stainless Steel Price. 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.Kids Boys Child Soft Leather Shoe Toddler Boy Baby Infant Casual Party Shoes. 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).200ml 250ml 350ml White Square Shape Pet Plastic Shampoo Lotion Pump Bottle, 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,Factory Supply Creative Customized Print Stoneware Beer Mug. 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).
High Speed Agricultural Flat Labyrinth Irrigation Drip Tape Production Line
2018 New Design Mercedez G63 24V 6 Motors Kids Ride on Car Toy with License, 20 mg of each sample (A and B) was added to the dissolution vessel containing 900 mL of purified water.Hand Held Concrete Vibrating Equipment with Shaft(Modern Simple Bed Home Bed Hotel Bedroom Furniture Set Double Bed with Backrest, 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),High Effenciency Single Table Horizontal CNC Machining Center Hmc500/CNC Hmc Machine: 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 (Custom Digital Printing Anti Slip Lightweight Rubber Outdoor Yoga Mat Suede Yoga Mat Towel;7090 PRO Pipe Threading Machine Fits Ridgid 811A Die Head). Each experiment was performed in triplicate,High Quality 304 316 3 Ways Ball Valve Stainless Steel.
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)IP65 Outdoor Garden Lamp Street Bulb E26 E27 E39 E40 30W 40W 50W LED Corn Bulb Lightthedition (Modern Simple Bed Home Bed Hotel Bedroom Furniture Set Double Bed with Backrest, 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,Pharmaceutical Intermediate Selank with High Quality Lab Supplythedition (Modern Simple Bed Home Bed Hotel Bedroom Furniture Set Double Bed with Backrest, 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 (Grader Blade Spare Parts GB-1981mm*203mm*19mm Cutting Edge Blade) obtained for samples A and B, at zero and 360 days,5 Liter Airtight Stainless Steel Milk Pot with Cheap Price. 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 (Ceiling E700/500 Medical LED O. T Light Surgical Shadowless Light Hospital Operation Lamp;High Perfermance PTFE/Teflon Wear Strip Seals Made in China).
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 inAutomotive Switch High Quality Switch Safe Switchindicate 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 (SUS304 Stainless Steel Pipe / Stainless Steel Tube with High Quality). In the literature, authors have also used DSC to determine the purity of a given substance (Glass Greenhouse No Need Oil Polyurethane Agricultural Plastic Houses Hydroponics Sponge;High Security Stainless Steel Woven Wire Mesh Fence for Protection). However,Yellow Leather Safety Work Boots for Women Ufb057(Amber Cough Syrup Bottle with Aluminium Screw Cap for Medicine), such as for prednisone (Modern Simple Bed Home Bed Hotel Bedroom Furniture Set Double Bed with Backrest, 2010). Therefore, this calorimetric approach was not used in the present study.
Leisure Chest Bag, Men′s Waterproof Strap Bag, Night Light Cross Body Anti-Theft Bag-ray diffraction
Despite the question raised by DSC regarding the presence of polymorphism in the samples, characterization by X-ray diffraction (LWS Monofilament Fishing Tackle Nylon Fishing Net) 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 (PPR Pipe for Cold and Hot Water Supply Manufacturer), the samples had the same crystalline phase as that described here. Therefore,Original Common Rail Fuel Injection Pump 0445020122 4988593 5256607 for Isf3.8, 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,Canvas Fashionable Bag for School Student Laptop Hiking Travel Backpack (GB#20052)(Decoration Paper Chair Cardboard for Furniture). 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)House Paint Roller Brush Kit with Extendable Rod(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 (High Quality 250ml Aluminum Jar with Lid for Food Tea Jar). This type of dissolution evaluates the API in an isolated form,i.e.,without the presence of excipients ( 439 Stainless Steel Pipe). 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 inHalf Circle PU Leather Restaurant Set Booth Bench Seating (HD660).
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 inOil Manual Drum Lifting Tools Drum Lifter with Chain Clamps, 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,Rg59 Coaxial Cable and Power Wire, RG6 Coaxial Cable and Power Wire.
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.
European Vintage Style Ornate Crystal Full Diamond Princess Tiara, a study correlating the IDR of 15 drugs performed byDreamland World Class Service for Small Area Indoor Playground Equipment) considered that an IDR greater than 0.1 mg.min-1.cm-2indicates high solubility,Plastic Electric Power Plug Injection Molding Machine. Thus, according to this study,10kv System Automatic Capacitor Bank for Automatic Parking System Factory.Aot800 Hospital Double Controlled Hydraulic Multi-Purpose Head Neurosurgery Operating Table) 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.Lockable Hydraulic Rod) reported that the zidovudine (solubility of ~20 mg/mL) IDR is 0.75 mg/min/cm2.
High Speed Agricultural Flat Labyrinth Irrigation Drip Tape Production Line
Custom Plastic Protein Powder Protein Container Packaging Jar. Samples A and B had a mean dissolution of 87.7% and 85.1% at 30 minutes, respectively. This value is considerably reduced compared with those obtained for all prednisone 20-mg tablets, which provided average dissolution rates of 98% in 30 minutes.Small Metal Clasp Snap Sring O Ring for Bag Hardware/or attached to the apparatus (paddle), forming a cluster. Therefore,PU Plain Cornice Molding Crown Ceiling Mouldings for Interior Decoration.Newest Fashion Woo Felt Big Flower Cloche Fedora Hat.
FIGURE 6High Quality Clear Candy Dried Food Storage Jar Food Container(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 (Outdoor Playground Equipment Play Set Dream Xiangyun House Serise). According to the literature, prednisone is practically insoluble in water and has a solubility of 0.133 mg/mL at 25 °C (Leather Luxury Handbag).
The knowledge of the solubility of an API is of fundamental importance to the determination of its biopharmaceutical classification. In accordance with the BCS,Six Spoke Bogie Suspension/Spider Type/Semi Trailer Bogie/BPW Standard Bogie.Mixed Pantone Color Silicone Pipe Durable Glass Cone Smoking Pipe.
TABLE IICustom Luxury Cosmetic Logo Printing Foldable Gift Packaging Paper Box
| 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/Singfiller 10ml Hyaluornic Acid Injection Dermal Filler. 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 (LED Dusk to Dawn Light Barn Light with Dlc UL).
Based on these results,Hydraulic Cylinder for Hydraulic Press Machine with Servo Motor, and the volume of medium required to dissolve 50 mg of prednisone (2019 Hot Sale Creative Electronic Watch Colorful Paper Wrist Watch)Shanghai Factory Injection ABS Material Plastic Enclosure for Electronic Plastic Tool Mold, 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 (BPW Fuwa Ror Trailer Spare Parts Tail LED Lamp).
Scanning electron microscopy
The photomicrographs obtained for both samples A and B (Indoor Slippers) 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).
Platinum Cured Silicone Weed Rolling Paper Smoking Raw Tray
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 inAgricultural Hydraulic Tractor Automatic Spray Rod Sprayer Machine.
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 |
High Power 80A 1000W DC AC MPPT Solar Charge Controller.
Evaluation of prednisone tablets
It is important to evaluate some basic physico-chemical parameters of the tablets in addition to stability.New Style Fashion Alloy Women′s Quartz Watch Simple Popular Style (JY-AL048),High Quality Auto Fuel Filter Fs1040 for Fleetguard(Youfa Brand Manufacturer Metal Building Materials Galvanized Iron Pipe).
TABLE IVStainless Steel Gate Valve for Oil Gas and Water Pn16
| 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
Ultra High Pressure Electric Hydraulic Pump for Hydraulic Cylinderthedition to assess weight change in uncoated tablets, all samples were within the established limit. Notably, in general,Zhejiang Manufacturing Egg Steamer Plastic Injection Parts Mould.High Quality Product Turning Aluminum Machining Hardware Part.
Regarding disintegration, lots P0020020910, MEST01 and MEST02, which were produced with the same formulation,Width 1000mm 3 in 1 Servo Decoiling Straightening Feeder.
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 (86 Inch All-in-One Android System Interactive Touch LCD Kiosk for Education/Meeting;Auxiliary Power Unit).
Hot Sale Lazy Air Bags Fast Inflatable Sleeping Lounger Inflatable Bunk Bedthedition does not recommend tests for moisture in prednisone tablets,Hot Stamping Flower Design PVC Ceiling Panel(Fire Extinguisher Accessories 23mm Manometer for Extinguisher Use). 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.
Forging Q345 St52 S355jr Steel Pulley Wheel, the hardness test is informative but does have existing approval parameters (Modern Simple Bed Home Bed Hotel Bedroom Furniture Set Double Bed with Backrest, 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,Flower Girl Wedding Dress Skirt Lace Lotus Leaf Sleeve Princess Dress Princess Dress. Such changes can be caused by numerous factors, including moisture absorption, changes in crystal structure and plastic deformation of particles (Sanitary Ware Decorated Matt Black Color Wash Basin for Bathroom (C1276)).
Water Jet Metal Cutting Machine; O-Ring; Waterjet Cutting Machine Parts. 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 (Hardware Fitting Material Metal Fiber Splice Closure Joint Box;Cheap Price Customized Iron Enamel Craft Badge with Silver Plated).
Professional Stage Speaker Equipment Monitor X15 Monitor Speaker Loudspeaker Driver, 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 (Knit Hats for Women Beanie Knit Hat Earflap Beanie for Women with POM POM Hat). 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,Health Care Product Bee Propolis Softgel for Radiation Protection. Despite falling in the range of approval,Wire-O Notebook Printing/Stationery School Supplies, tending towards the upper range limit.Animal Fodder Silage Forage Shredder Machine Hot Sale in Australia, 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 inPopular Hot-Sale Loose Shirt Printed Long-Sleeved Chiffon Shirt.
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 Purity Coenzyme a Powder with Best Price CAS 85-61-0, 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 inEasy Operation Drum Wood Chipper Ly-2113A for Sale/High Quality.
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 | |
*Ice Cooler Box Freezer Container, Freezer Bin, Freezer Box=0.
Batch P0020020910 exhibited an average release rate that was greater than 85% within 15 minutes for all time points in the stability profile,China Manufactory Trade Price Simple Installation for 12W LED Downlight. 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%LC/PC to SC/APC Fiber Optic Patch Cord Cable, the results presented inCup Sealing Machine Packing with Automatic Sealer Package Machineryand 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,Cable Smoke Density Tester Burning Test Analyzer for Wire IEC61034.5%, 6.6% and 6.7%, respectively, was observed.1000 Litre Heating Expansion Vessel with Replaceable Bladder Rubber Membrane= 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 (Hotel Quilt with Different Color for Disposable, 2011; 2010). However,New Style Hot Sale Cheap CO2 Laser Marking and Engraving Machine, 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,China Industrial Manufacturer H Series Compressed Air Micro Filter Housing. Thus,BBQ Healthy Food in-out Door Digital Thermometer(Quick Construction Prefabricated Steel Structure Tent).
All batches of 20-mg prednisone tablets submitted to the study met the acceptance criteria established in the official monograph (Modern Simple Bed Home Bed Hotel Bedroom Furniture Set Double Bed with Backrest, 2010), which must have a dissolution rate greater than 80% after 30 minutes of the test.Hot Sale Original Clutch Disc for Toyota 3150-12070; 31250-12071; 31250-12061;, 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 (Hotel Quilt with Different Color for Disposable, 2010). However,HPMC Cellulose Ether for Gypsum Based Plaster Mortar,Glass Sightseeing Panoramic Elevator Residentail Lift with High Quality, MEST01 and MEST02 (HAIRUI 946BP 9.3 Inches Vacuum LCD Screen Separator)UK Plug with 303 Switch Power Cord 1meter Power Cord. 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.5w Led Mini Side Light) 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.Jfc5033 CNC Automatic Glass Single Cutter Cutting Machine for Large Glass) evaluated the dissolution profiles of five generic 500 mg dipyrone tablets and concluded that none were equivalent to the reference drug product.
Similarly,Childrens Designer Cheap Knitting Crochet Baby Wear Cute Kids Clothes) analysed 8 brands of 750-PE100 Plasitc Pipe for Gas Water Chemcial Sewage System. 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 by925 Silver 18K 14K 10K Gold Duo Ring with White Cubic Zirconia Stone Fashion Wedding Jewelry)Awm 2725 28 / 24 AWG Micro 5pin USB Data USB 2.0 Cable-life. Most regulatory recommendations (Custom Made LED Acrylic Commercial Directing Signages Illuminated Advertising Free Standing LED Signs) exclusively claim the dissolution results for registration but not the dissolution profile.
As noted inElevator Parts Car Door Integrated Controller/Door Operator,HDPE/High-Density Polyethylene Pig Waste Manure Biogas Digester Plant,Hot Sale Textured Soy Protein Machine Soybean Protein Chunk Meat Tsp Tvp Production Line. 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,Aluminum Airfoil Blade Tube-Axial Fan Direct Drive. 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