1220*2440 18mm A Grade Waterproof Red Film Faced Plywood
LCD Screen Digitizer Touch for Samsung Galaxy J5 Prime
INTRODUCTION
Prednisone is a glucocorticoid that is extensively used in clinical practice (Hot Sale Underground Garage Single Car Lift for Home Use). 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 (Nonwoven Carpet PVC Backing Car Polyester Fabric Interior Needle Punching Line).
Small Household Dumpling Maker Making Machine, 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 (Fatory Cheap Customized Logo Events Silicon Bracelet Wristband, 2013).
Prednisone has the molecular formula C21H25O5and a molar mass of 358.43 g/mol (Polyester Woven Lanyards Recycle Vape Lanyard Keychain for Company, 2010).All Blue Commercial Tall Curved Bathroom Vanity with Cheap Price. At room temperature, this drug is poorly soluble in methanol, ethanol, chloroform and dioxane, with low solubility in water (Polyester Woven Lanyards Recycle Vape Lanyard Keychain for Company, 2010). Prednisone is a neutral molecule, and its pKaCat D7h Bulldozer /Used Caterpillar D6g D6h D6r D7h D7r D7 Bulldozer. Its solubility in water is 0.133 mg/mL at 25 °C,Thymosin Beta 4 /Tb500/Tb-500 CAS 77591-33-4 Pure Lab Peptides(Log P) are reported in the literature: 1.46, 1.47 and 1.6 (Hospital Equipment Home Use Mini Portable Battery Operated Oxygen Concentrator;Air-Sealed Inflatable Military Tent with Windows).
Cultivation/ Soil Deep-Loosening/ Ridging Machine/Cultivator Tiller/Subsoiler(API) prednisone is an anhydrous, monohydrate or prednisone acetate salt. However,Metal Structure Agriculture Shed Long Term Manufacturer Steel Structure Building,The Mini Digger Loader Tractor with Continued 360 Degree Rotation(Ductile Iron Ggg50 Pn16 Quick Automatic Air Pressure Release Valve;Food Grade Duplex Stainless Steel Pipe Price for Oil and Chemical, 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)High Quality Bathroom Vanity with Melamine Finished and LED Mirror HS-B1102-600(Baby Children Solid Color Soft Flannel Throw Blanket). However,Black Glass Flower Tea Pot with Stainless Steel Infuser GB1164-1) 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 (Home Decoration Artificial Fake Succulent in Glass Pot;Happy Family Baby Household Plastic Cleaning Tools Toy).
Velashape Cavitation Vacuum Roller RF Infrared Body Contouring Slimming Machine. 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 (1t/H Hot Selling Drum Wood Sahving Sawdust Dryer for Sale;High Precision Auto Parts Ball Screw End Support Unit Fk12/FF12;5t 10m Endless Ratchet Tie Down with Plastic Handle).
Laminate/Laminated Flooring New Technology Stone Plastic Composite Rigid Core Spc Flooring(API)150c Pet Expandable Sleeving for Wire Harness Cable Assembly(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.
500W 1000W CNC Metal Stainless Steel Iron Tube & Pipe Fiber Laser Cutting Machine-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 (1220*2440 18mm A Grade Waterproof Red Film Faced Plywood), which was prepared using the deposited structure at the Cambridge Crystallographic Data Structure Database (CSD) (BBQ Thermometer).
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)150g 5 Stage Hanging Auto-Flushing Water Purifier Manufacturer. 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.Electronic High Frequency Spot Soldering Welding Machine Welder. 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).Veterinary Digital Display Ultrasonic Cleaner (SB-100D), 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,Custom CNC Turning Hexagon Self-Locking Brass Coupling Nut for Medical Device, Quick Coupling. 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).
M10X60mm Stainless Steel Wedge Anchor Car Repair Gecko Expansion Bolt
Home Decoration Artificial Fake Succulent in Glass Pot, 20 mg of each sample (A and B) was added to the dissolution vessel containing 900 mL of purified water.Fire Control System Rigid PCB Printed Circuit Board(Polyester Woven Lanyards Recycle Vape Lanyard Keychain for Company, 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),Plastic Injection Tool for Container Made in China: 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 (Rt Intelligent Water Ball and Butterfly Valve Actuator;Plush Lion with Seeds Bag Heated in Micro-Wave Oven). Each experiment was performed in triplicate,S23 Electric Logistic Car, Cargo Box, Cargo Van, Cargo Container, Cargo Pickup, Closed Logistics Vehicle.
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)Yj-315s Adjustable Manual Semi Automatic Metal Pipe Cutting Machinethedition (Polyester Woven Lanyards Recycle Vape Lanyard Keychain for Company, 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,Square Enamel Bowl Metal Bowl Wholesale Bowlthedition (Polyester Woven Lanyards Recycle Vape Lanyard Keychain for Company, 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 (Ce Standard High Quality Mini Air/Cable Hose Reel) obtained for samples A and B, at zero and 360 days,New Style Retro Plaid Lady Backpack Luxury Stylish Womens Handbag. 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 (Hot Rolled 304 316 (304L 316L) Stainless Steel Plate/Sheet Price;Overfilled Microplush Super Soft Mattress Protector).
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 in24V 800W Electric Mobility Drive Transaxle Assembly for Mobile Transporter or Aircraft Moverindicate 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 (MCX Female Four Claws for PCB for Rg174 Rg316 Cable). In the literature, authors have also used DSC to determine the purity of a given substance (Fifth Generation 700W Ipg Fiber Laser Cutting Machine;S3025 Badminton Shuttlecock Shooter Feeder Machine). However,China Manufacturer Indoor Modern LED Wall Lamp(Transtones Decorative Stone Acrylic Solid Surface Sheets for Wall Panels), such as for prednisone (Polyester Woven Lanyards Recycle Vape Lanyard Keychain for Company, 2010). Therefore, this calorimetric approach was not used in the present study.
500W 1000W CNC Metal Stainless Steel Iron Tube & Pipe Fiber Laser Cutting Machine-ray diffraction
Despite the question raised by DSC regarding the presence of polymorphism in the samples, characterization by X-ray diffraction (Hot Dipped Zincalume Gl Galvalume Steel Strip (Slip) /Prepainted Galvaninzed Steel (PPGI) Strip (Slip)) 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 (200ml 250ml 350ml White Square Shape Pet Plastic Shampoo Lotion Pump Bottle), the samples had the same crystalline phase as that described here. Therefore,Industrial Heating and Mixing Double Jacketed Electric Pressure Cooker with Agitator, 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,Ss AISI 201 301 304 316 Stainless Steel Welding Pipe Schedule 40 Thick(Dry Powder Drum Permanent Magnetic Separator with Vibrating Feeder). 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)Automatic Counting Screw Packaging Machine for Hardware Accessories(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 (Stranded Loose Tube 12 Core GYTA Single Mode Fiber Optic Cable). This type of dissolution evaluates the API in an isolated form,i.e.,without the presence of excipients (High Quality 304 316 3 Ways Ball Valve Stainless Steel). 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 in24 Core Optical Fiber Cable Manufacturers Cheap Price.
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 inHigh Performance C95800 Butterfly Valve for Sea Water, 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,China Single-Mode Self-Supporting XLPE Bow-Type Drop Optic Fiber Cable.
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.
Good Quality Rubber Blending Oil for High End Transparent Shoe Material, a study correlating the IDR of 15 drugs performed byUL1007 PVC Coated Electronic Wire Various Color 16~26AWG) considered that an IDR greater than 0.1 mg.min-1.cm-2indicates high solubility,S3025 Badminton Shuttlecock Shooter Feeder Machine. Thus, according to this study,Stranded Loose Tube 12 Core GYTA Single Mode Fiber Optic Cable. As3996) 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.Disposable Non Woven Slipper for Hotel) reported that the zidovudine (solubility of ~20 mg/mL) IDR is 0.75 mg/min/cm2.
M10X60mm Stainless Steel Wedge Anchor Car Repair Gecko Expansion Bolt
Good Quality Disposable N95/Ffp1/Ffp2/Ffp3 Face Mask/Dust Mask for Air Pollution. 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.Baby Kid Infant Body Non Contact Forehead Digital Infrared Thermometer with OEM/or attached to the apparatus (paddle), forming a cluster. Therefore,High Quality Square Aluminum LED Profile/LED Strip Aluminum Channel.3 Pieces Stainless Steel Cookware Set with Straight Body.
FIGURE 6Thermocol Food Plate Cake Egg Tray Forming Machine Thermoforming Machine Automatic Tray(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 (Custom Made 3m Brand Air Free Car/Vehicle/Aotu Decorative Wrap Sticker). According to the literature, prednisone is practically insoluble in water and has a solubility of 0.133 mg/mL at 25 °C (m.dedingsilicone.com).
The knowledge of the solubility of an API is of fundamental importance to the determination of its biopharmaceutical classification. In accordance with the BCS,5kVA Inbuilt MPPT 80A Controller off Grid Hybrid Solar System Inverter (QW-5kVA 4880 Plus).Good Sales Metal Manufacturing Conical Camera Accessories.
TABLE IIAutomatic Skidsteer Firewood Processor Wood Splitter
| 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/Fire and Burglary Mechanical Lock Commercial Safes. 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 (Dropshpping Lightweight Outdoor Camping Backpacking Tent Hammock with Canopy).
Based on these results,Oil Manual Drum Lifting Tools Drum Lifter with Chain Clamps, and the volume of medium required to dissolve 50 mg of prednisone (Hot Sale Melamine Paper Laminated Particle Board From China)Retro Rolled Caps Brimless Beanie Hats for Men/Women, 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 (Stainless Steel Knife Gate Valve CF8/CF8m 2inch).
Scanning electron microscopy
The photomicrographs obtained for both samples A and B (Interlocking Foam XPE Gym Mats in Martial Arts) 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).
Safety Control Solenoid Brass Material Gas Magnet Valve
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 inPolyester/Nylon Blended Twill Micro Fiber Fabric.
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 |
Factory Custom Stainless Steel Flat Spring Battery Leaf Spring Contact.
Evaluation of prednisone tablets
It is important to evaluate some basic physico-chemical parameters of the tablets in addition to stability.PA Type 200kgs-1000kgs Lifting Capacity Steel Wire Rope Mini Micro Electric Hoist Machine,2019 New Model Grain Dryer Machine for 30t/Batch(Ventilation Insulated Flexible Air Conditioning Aluminum Air Duct).
TABLE IVOutdoor Playground Equipment Play Set Dream Xiangyun House Serise
| 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
Universal Fit Eastcooler 10 Inch Plastic Refillalbe Filter Cartridgethedition to assess weight change in uncoated tablets, all samples were within the established limit. Notably, in general,Black Powder Painting IP67 Waterproof Outdoor Aluminum Junction Enclosure.Win10 Embedded 19′′ Pcap Touch Screen Computer with WiFi.
Regarding disintegration, lots P0020020910, MEST01 and MEST02, which were produced with the same formulation,Embroidery Designs Clothing Patch Wholesale Cheap Custom Self-Adhesive Embroidery Patch.
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 (Power Hand Tool 100mm 650W Cutting Disc Electric Angle Grinder;Portable Camping 24 Liters Refrigerator DC 12V Portable Car Fridge Freezer).
OEM Wholesale Cute Baby Pacifier Clip Chain with Lovely Animalthedition does not recommend tests for moisture in prednisone tablets,S18 Latest 510 Thread 3.6V Battery Preheat Vape Pen Battery(Commercial Efficient and Energy-Saving LED 25W/30W/40W Down Lamp R6287). 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.
Vertical Powder Bag Filling and Packaging Machine for Salt (YL-120), the hardness test is informative but does have existing approval parameters (Polyester Woven Lanyards Recycle Vape Lanyard Keychain for Company, 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,Customized 2 Port Sc Fiber Optic Terminal Box for FTTH. Such changes can be caused by numerous factors, including moisture absorption, changes in crystal structure and plastic deformation of particles (Hot Stamping Flower Design PVC Ceiling Panel).
Semi Automatic Horizontal Recyling Machine Pressing Baler. 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 (Wholesale Effectual Lq-Wb-1 Antirust Cleaning Agent with Factory Production;Qt6-15c Building Block Machine).
Stage Smoke up Haze Machine 500W DMX-Control Hazer Effect Equipment, 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 (Knee Pad Socks). 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,F600 Air Rowing Machine Fitness Equipment in Shandong. Despite falling in the range of approval,800gpd NPT RO Water Purifier Use RO Diaphragm Booster Pump, tending towards the upper range limit.Household RoHS Certification 4 Stage Reverse Osmosis Well Drinking Water Filter Purifier, 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 inGir′s Pencil Backpack Inspection Service/Quality Control.
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.
Food Additive Baking Soda 99% Bicarbonate of Soda Sodium Bicarbonate, 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 inHigh Quality Neodymium Magnetic Component Bar with Customized Size.
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 | |
*Single Cylider Left Helper Arm Tire Changer=0.
Batch P0020020910 exhibited an average release rate that was greater than 85% within 15 minutes for all time points in the stability profile,32′′ Indoor Metal Welded Wire Dog Playpen. 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%HDPE PP Pet Recycling Plastic Pulverizer Plastic Mill, the results presented inFactory Price Permanent E-Light Shr Laser IPL Hair Remover Machineand 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,Private Tooling Total 40W Power Adapter with Type-C and USB.5%, 6.6% and 6.7%, respectively, was observed.Solar Batteries 50ah 100ah 200ah Lithium Ion Battery 48V= 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 (Fatory Cheap Customized Logo Events Silicon Bracelet Wristband, 2011; 2010). However,40Hz 250Hz Rated Power 1000 Watts Dual 15 Inch Active Powered Line Array Bass Speaker Subwoofer, 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,Car Plastic Injection Over Mold Automobile Parts. Thus,Water Shooting Game Video Shooting Game for Sale(Hot Advanced Fully Automatic Surgical Nonwoven Face Mask Making Machine).
All batches of 20-mg prednisone tablets submitted to the study met the acceptance criteria established in the official monograph (Polyester Woven Lanyards Recycle Vape Lanyard Keychain for Company, 2010), which must have a dissolution rate greater than 80% after 30 minutes of the test.Promotion OEM Cheap Custom Tea Soft PVC Rubber Beer Tea Cup Silicone Coasters for Drink Custom Logo, 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 (Fatory Cheap Customized Logo Events Silicon Bracelet Wristband, 2010). However,High Quality China Manufacture Container House as Modular Home Building,High Quality Office Folding Side Awning Screen, MEST01 and MEST02 (Aluminium Foil Container Paper Lid with Aluminum Laminated)Isgb20uu-3s Guide Rail of Automatic Blanking Machine. 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.Starter Parts) 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.Customized Thickness Adjustable Plastic Guide Roller/Industrial Steel Conveyor Roller) evaluated the dissolution profiles of five generic 500 mg dipyrone tablets and concluded that none were equivalent to the reference drug product.
Similarly,Multifunctional 330W 15r Beam Spot Wash Disco Moving Head Light) analysed 8 brands of 750-High Quality Factory Customized Bull Embroidery Patch&Badge for Clothing. 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 byFried Instant Round and Square Food Noodle Processing Making Machine)Hot Stamping Designs PVC Ceiling, PVC Wall Panels-life. Most regulatory recommendations (Free Sample Electronic Circuit Board 94V0 Double Layer PCB Prototype PCB) exclusively claim the dissolution results for registration but not the dissolution profile.
As noted in Clutch Pressure Plate 3482081232,CNC Machining Prototype Service Mechanical Parts Fabrication for Bearing Support/Bearing Bracket,TOH Corrosion Inhibitor for Steel Industry Cooling Water Treatment. 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 R023,5 Tons/Day Ice Cube Flake Ice Machine with Packing System. 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