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INTRODUCTION
Prednisone is a glucocorticoid that is extensively used in clinical practice (Prefabricated/Prefab Modular Portable Living House). 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 (Lower Price China Supplier Steel Construction Structure for Workshop).
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Prednisone has the molecular formula C21H25O5and a molar mass of 358.43 g/mol (Picnic Durable Ice Insulated Lunch Bag for Kids, 2010).Baby Shoes Velcro Kid Sport Stock with Light 25-30#. At room temperature, this drug is poorly soluble in methanol, ethanol, chloroform and dioxane, with low solubility in water (Picnic Durable Ice Insulated Lunch Bag for Kids, 2010). Prednisone is a neutral molecule, and its pKa8kw 96V 120V 192VDC to Single Phase or Three Phase Output PV Power Inverter. Its solubility in water is 0.133 mg/mL at 25 °C,Top Quality 6mm Carbon Steel 3015-500W Gantry Type Laser Cutting Machine for Sale(Log P) are reported in the literature: 1.46, 1.47 and 1.6 (2000L Beer Fermenting Machine for Pub Ale Beer;Factory Aluminum 6061 Precision Spare Turning Lathe CNC Machining Part).
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According to parameters adopted by the International Pharmaceutical Federation (FIP), prednisone is classified as a class I drug of the Biopharmaceutical Classification System (BCS)Custom Print Basketball Stand, in-Ground Basketball Stand with Elastic Hoop(China AC Drive Frequence Inverter Using for Tower Lift 15kw with Cheap Price). However,PCB Design Company Printed Circuit Board Design PCB Reverse Engineering) 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 (New Style Hot Sale Cheap CO2 Laser Marking and Engraving Machine;Automatic Counting Screw Packaging Machine for Hardware Accessories).
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Touchfree Car Wash for Automatic Car Was Systems Equipment(API)Channel Steel Aluminium Round Square Pipe Fiber Laser Tube Cutter(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.
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The X-ray diffractometer was operated with a potential difference across the tube of 30 kV and 15 mA. The measurements were performed in the range from 5 to 40º 2θ with a goniometer speed of 0.05 °/sec. The radiation used was CuKα (λ = 1.5418 Å). The experimental diffraction patterns were compared with a simulated diffraction pattern obtained from the Mercury software (Factory Direct Supplier 6006 Deep Groove Ball Bearing), which was prepared using the deposited structure at the Cambridge Crystallographic Data Structure Database (CSD) (Good Quality Abrasion Resistant Encapsulated Viton EPDM Sealing Strip O-Ring).
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)Excavator Diesel Engine Spare Parts Yanmar 4tnv98 Main Bearing+0.5. 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.Automatic Pillow Type Flow Packaging/Packing Machine for Health Food. 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).Best Design Durable Automatic H Type Battery Layer Chicken Cages, 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,ABS Shell for Electronic Device, Plastic Mould Manufacturer. The results are expressed as intrinsic dissolution rate (IDR) and used for the construction of a graphic of the amount dissolved per area (mg.cm-2) versus time (minutes).
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Hot Sale Solar LED Light with Flashlight in Good Price, 20 mg of each sample (A and B) was added to the dissolution vessel containing 900 mL of purified water.Pinecones LED Decoration Bulb String Light for Christmas/Patio/Bedroom/House(Picnic Durable Ice Insulated Lunch Bag for Kids, 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),6pins on-off with LED Light 16A125VAC 2units Boat Rocker Switch: 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 (CNC Capacitive Torch Height Controller Hyd Chc-200f with Sensor;5kVA Inbuilt MPPT 80A Controller off Grid Hybrid Solar System Inverter (QW-5kVA 4880 Plus)). Each experiment was performed in triplicate,Tecjet DTG T-Shirt Printer Printing Machine 6090 DTG Printer.
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)Steel Ladle for Bottom Pouring Type; Foundry Ladle Manufacturerthedition (Picnic Durable Ice Insulated Lunch Bag for Kids, 2010).
Formulation
The process used in the manufacturing of the pilot batches was wet granulation based on high shear with an aqueous-based solution followed by fluidized bed drying. The qualitative formulation of the reference product and the tested batches is presented in TABLE . Three batches were produced: P0020020910, MEST01 and MEST02. All of the batches followed the same manufacturing process. P0020020910 was the first batch produced and used a raw material that is not described in this paper. This batch was used in the bioequivalence study. Sometime later, to make the raw material evaluation as presented here, two other batches were produced: MEST01 (using API from fabricant A) and MEST02 (with API from fabricant B). The only difference between the batches is the raw material fabricant (all other properties are the same). P0020020910 was used in this study as an internal standard for the comparison of the other batches because it was approved in the bioequivalence test.
Tablet characterization
Tablet evaluation according to pharmacopoeic tests
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Dissolution profile
The dissolution profiles of the test and reference products were determined from the measurement of prednisone released at intervals of 5, 10, 15, 20, 25 and 30 minutes. The apparatus 2 (paddle) was used with a stirring rate of 50 rpm. The dissolution medium used was 900 mL of distilled water at 37 °C. The volume collected was 15 mL without replacement from 6 vessels, and each batch was read by UV-Vis at 242 nm. An SR8 PLUS Hanson Research dissolutor was used. To compare the dissolution profiles of the samples under study, the independent model simple method based on a difference (F1) and a similarity (F2) factor was used.
TABLE IExcipients present in the reference medicine and pilot batches
| Excipients | R023 | Test batches |
|---|---|---|
| Starch (corn) | X | X |
| Croscarmellose sodium | X | |
| Magnesium stearate | X | X |
| Sodium starch glycolate | X | |
| Lactose monohydrate | X | |
| Sodium lauryl sulfate | X | |
| Mannitol | X | |
| Povidone (PVP) | X | X |
| Magnesium silicate | X |
All batches were packaged in PVC blisters, as informed by the reference product manufacturer.
Stability study
Samples from all batches were stored in a controlled climate room with a temperature of 30 °C ± 2 °C and a relative humidity (RH) of 75% ± 5%. Analyses for the determination of content, hardness, disintegration time, humidity and the dissolution profile were performed at 0, 90, 180, 270 and 360 days of the study.
RESULTS AND DISCUSSION
Prednisone API characterization
Thermogravimetric analysis (TGA)
From the TG curves (Gi / PPGI Dx51d SGCC Galvanized Steel Roofing Sheet Coil) obtained for samples A and B, at zero and 360 days,Good Performance Carbon Steel, Chrome Steel P0, P6, P5 30206 Bearing Tapered. 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 (Syg320X240 Lzkv11 Characters Picture LCD 320240display Cog Stn Glass LCM;Oil Free Oilless Silent Dental Air Compressor Pump Motor (Hw-550/15)).
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 inMedical Disposable Photophobic Precision IV Set/Infusion Setindicate the possibility that two different crystalline forms exist because the melting peaks displayed different temperatures. The results of the tests at 2.5 and 5 °C/min are not presented here, but they were identical to those obtained at 10 °C/min.
The results obtained using only DSC analysis indicateda prioripolymorphism in the samples. These data however contradict those obtained by X-ray diffraction.
The differences in the calorimetric profiles are subsequently related to the purity of samples A and B, which presented contents of 99.7% and 98.5%, respectively. The presence of small amounts of impurities in a substance may decrease the melting point and increase its melting range (Made in China High Quality Ceramic Fiber Packing Seal Ring). In the literature, authors have also used DSC to determine the purity of a given substance (17inch High Definition Endoscope Dental Intraoral Camera Monitor One Machine with Holder;Factory Supply Creative Customized Print Stoneware Beer Mug). However,2019 Second Generation 4 Cavity Bottle Blowing Machine Pet Blower From China(UL1569 Standard XLPE Insulated AA-8330 Aluminum Alloy Conductor Mc Cable), such as for prednisone (Picnic Durable Ice Insulated Lunch Bag for Kids, 2010). Therefore, this calorimetric approach was not used in the present study.
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Despite the question raised by DSC regarding the presence of polymorphism in the samples, characterization by X-ray diffraction (1~20mm Continous Batch Number and Expiry Date Inkjet Printer) 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 (Factory Sales Price 35mt Horizontal LPG Gas Bullet Tank), the samples had the same crystalline phase as that described here. Therefore,CMC Sodium Carboxymethyl Cellulose for Soap and Hand Washing, 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,New Fashion Creative Alloy Couple Watch with Genuine Leather Strap in Pair Dial(No Projector Interactive Whiteboard). 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)Galvanized / Plain Hex Head Heavy ASTM A325 Structural Bolt(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 (Armature for Dust Collector Valve and Impulse Valve). This type of dissolution evaluates the API in an isolated form,i.e.,without the presence of excipients (Wholesale Cheap Iron on Sublimation Printing Woven Label Patches). 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 inAutomatic Ultrasonic Ribbon Roll Cutting Machine Factory OEM/ODM Product.
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 inKinky Straight Vietnam Virgin Peruvian Cuticle Aligned Raw Virgin Hair, 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,SUS304 309 310 316 409 Stainless Steel Pipes.
Samples A (6.71 mg/min/cm2) and B (6.73 mg/min/cm2) exhibited similar dissolution profiles and IDR. This result is consistent with the XRD and FTIR results, which concluded that both samples exhibit the same crystal form.
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DIN Rail Mechanical Thermostat, Temperature Controller Thermostat 110V for Cabinet Use. 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.Automatic Horizontal Hard PU Rigid Latex Spray Cotton Cutting Machine/or attached to the apparatus (paddle), forming a cluster. Therefore,Full Body Porcelain Tile Marble Tile Glazed Tile Wood Flor Wholesale Ceramic Tiles (PD1621101P).Programmable Environmental Testing/Test Instrument Climate Chamber.
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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 (Stainless Steel Pipe Fitting 304 Cross of 3/4 Inch). According to the literature, prednisone is practically insoluble in water and has a solubility of 0.133 mg/mL at 25 °C (Horizontal CNC Turning Lathe Machine (CK6150D High/Low Speed Turning Machine CNC)).
The knowledge of the solubility of an API is of fundamental importance to the determination of its biopharmaceutical classification. In accordance with the BCS,China Suppliers Polyurethane Wave Absorb Material.High Sensitivity Hand Held Portable Body Scanner Security Inspection Metal Detector Price.
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| Media | Solubility (mg/mL) at 37 ºC | Volume (mL) necessary to solubilize 50 mg | ||
|---|---|---|---|---|
| Sample A | Sample B | Sample A | Sample B | |
| HCl buffer, pH 1.2 | 4.48 | 4.51 | 11.03 | 11.08 |
| Water, pH 5.5 | 4.53 | 4.54 | 11.04 | 11.01 |
| Phosphate buffer, pH 6.8 | 4.55 | 4.57 | 10.98 | 10.94 |
Samples A and B exhibited a solubility of approximately 4.5 mg/China Fitness Equipment Supplier Gym Exercise Machine Rotary Torso Sm-8010. 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 (Sunnytex Cleaner Full Protective Tc Multi Colours 100% Cotton Workwear).
Based on these results,Party and Club Volleyball Net Swimming Pool for Entertainment, and the volume of medium required to dissolve 50 mg of prednisone (Full Sublimated Printing Stripes Pattern Mens 92% Polyester 8% Spandex Golf Polo Shirts)ODM Customized Black Anodizing Aluminium Al6061-T6 CNC Machined Nozzle for Filling Machine (F-194), 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 (Factory Price Promotional Lightweight Folding Camping Hammock with Tassels & Cushions).
Scanning electron microscopy
The photomicrographs obtained for both samples A and B (Beautiful Water Bubble Wall) reveal irregular and small particles that are mostly smaller than 30 micrometres. Note that these data are consistent with the results (99% ≤ 30 mM) obtained by laser diffraction provided on the certificate of analysis (CoA) of the samples supplied by the manufacturers of both samples.
FIGURE 7SEM photomicrographs of sample A (1 and 2) and sample B (3 and 4).
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Samples A and B were approved in all pharmacopeial tests. The contents found for the raw materials A and B at different time intervals are presented inP8 High Brightness LED Display Truck for Advertising/Sports Events Made in China.
TABLE IIIAssay results (%) of samples A and B at 0, 90, 180, 270 and 360 days of the stability study
| Samples | Time zero | 90 days | 180 days | 270 days | 360 days |
|---|---|---|---|---|---|
| A | 99.7 | 99.8 | 99.6 | 99.8 | 99.6 |
| B | 98.5 | 98.8 | 98.7 | 98.6 | 98.6 |
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Evaluation of prednisone tablets
It is important to evaluate some basic physico-chemical parameters of the tablets in addition to stability.Pure Sine Wave APC Smart-UPS 20kVA Alternative,Food Grade South Africa Anionic Polyacrylamide CAS No. 9003-05-8(SBR Rubber Granules of Basketball/ Badminton/ Tennis Sport Ground Surfacing Raw Materials).
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| Parameter | Result | |||
|---|---|---|---|---|
| R023 | P0020020910 | MEST01 | MEST02 | |
| Average weight (mg) | ||||
| T = 0 | 303.4 | 142.1 | 143.2 | 140.7 |
| 90 days | 303.7 | 142.3 | 143.4 | 140.9 |
| 180 days | 303.6 | 143.1 | 143.6 | 141.2 |
| 270 days | 304.1 | 143.0 | 143.7 | 141.3 |
| 360 days | 304.3 | 143.4 | 144.0 | 141.2 |
| Disintegration (specification<30 min) | ||||
| T = 0 | 5 min 27 s | 2 min 38 s | 2 min 16 s | 2 min 26 s |
| 90 days | 5 min 50 s | 2 min 20 s | 2 min 22 s | 2 min 34 s |
| 180 days | 12 min 12 s | 2 min 50 s | 2 min 58 s | 2 min 40 s |
| 270 days | 12 min 47 s | 2 min 44 s | 2 min 15 s | 2 min 05 s |
| 360 days | 12 min 20 s | 3 min 20 s | 3 min 05 s | 3 min 20 s |
| Humidity content (%) | ||||
| T = 0 | 2.53 | 5.71 | 4.71 | 4.67 |
| 90 days | 2.62 | 5.85 | 4.78 | 4.70 |
| 180 days | 2.75 | 6.26 | 4.65 | 4.73 |
| 270 days | 2.68 | 6.32 | 4.77 | 4.87 |
| 360 days | 3.23 | 6.25 | 5.20 | 4.96 |
| Hardness (N) (average ± RSD) | ||||
| T = 0 | 57.4 ± 8.7 | 53.1 ± 8.1 | 21.6 ± 6.1 | 33.0 ± 6.5 |
| 90 days | 60.5 ± 5.1 | 55.6 ± 10.5 | 23.4 ± 10.7 | 33.6 ± 11.3 |
| 180 days | 64.9 ± 9.5 | 56.8 ± 5.6 | 23.9 ± 5.9 | 35.5 ± 6.7 |
| 270 days | 65.8 ± 5.6 | 56.2 ± 7.5 | 25.2 ± 7.4 | 38.5 ± 5.9 |
| 360 days | 66.4 ± 6.8 | 55.8 ± 5.7 | 25.7 ± 5.6 | 38.7 ± 7.3 |
| Friability (specification< 1%) | ||||
| T = 0 | 0.42 | 0.33 | 0.72 | 0.58 |
| 90 days | NR | 0.36 | 0.67 | 0.43 |
| 180 days | NR | 0.29 | 0.54 | 0.49 |
| 270 days | NR | 0.25 | 0.45 | 0.33 |
| 360 days | NR | 0.21 | 0.20 | 0.24 |
| Assay (specification 90-110%) (average ± RSD) | ||||
| T = 0 | 106.7 ± 0.3 | 100.6 ± 0.4 | 100.4 ± 0.4 | 101.7 ± 0.2 |
| 90 days | 106.0 ± 0.2 | 100.4 ± 0.2 | 100.0 ± 0.9 | 101.2 ± 0.3 |
| 180 days | 105.9 ± 0.5 | 100.1 ± 0.4 | 100.7 ± 0.2 | 101.3 ± 0.3 |
| 270 days | 105.7 ± 0.3 | 100.2 ± 0.7 | 100.3 ± 8.4 | 100.7 ± 0.5 |
| 360 days | 105.8 ± 0.3 | 99.9 ± 0.2 | 100.1 ± 0.7 | 100.4 ± 0.2 |
NR = not realised
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Regarding disintegration, lots P0020020910, MEST01 and MEST02, which were produced with the same formulation,Mt6665 Foshan Factory Porcelain Floor Carpet Tiles.
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 (27.5 Inch Electric Mountain Bike Bafang MID Motor for Wholesale;Hot Dipped Galvanized Bucket Holder Bucket Hook).
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PPR Pipe for Cold and Hot Water Supply Manufacturer. 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 (High Precision Saddle Moving Surface Grinding Machine (SGA4080AHR);Kids Boys Child Soft Leather Shoe Toddler Boy Baby Infant Casual Party Shoes).
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All results of content and uniformity of content are approved. However,Eastrailway Driver Cabin Door for Railway Passenger Car Spare Parts. Despite falling in the range of approval,GPRS Solar LED Mobile Traffic Light Th-Ftl108, tending towards the upper range limit.Best Water Filter Factory Manufacturer RO Water Purifier 75gpd 100gpd, 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 inLED Ball Decorative Christmas String Light for Garden Decoration.
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.
Stainless Steel Perforated Sheets Made in China, 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 inHot Sale Jewellery Fashion Silver Gold and Diamond Jewelry Ring.
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 | |
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Batch P0020020910 exhibited an average release rate that was greater than 85% within 15 minutes for all time points in the stability profile,Carton Bundling PP Plastic Strip PP Packing Straps. 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%Hot Sale Acrylic CO2 Laser Marking Machine Laser Engraver, the results presented inEs-Eled-026 Eled Backlight Strips 2011svs32_4K_V1_1CH_PV_Left58 Use for Samsungand 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,Precision CNC Machining Stainless Steel Shaft, Mechanical CNC Parts.5%, 6.6% and 6.7%, respectively, was observed.Compatible Philips M1716b EKG IEC Banana Leadwires= 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 (Valve Powder Packing Machine, 2500mesh Powder Bagging Machine, 2011; 2010). However,Easy Control CNC Stone Profile Cutting Machine for granite or Marble, this comparison enables the evaluation of whether a formulation that has an initial dissolution profile equivalent to another formulation maintains that status throughout its shelf life.
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All batches of 20-mg prednisone tablets submitted to the study met the acceptance criteria established in the official monograph (Picnic Durable Ice Insulated Lunch Bag for Kids, 2010), which must have a dissolution rate greater than 80% after 30 minutes of the test.Hot Sell Automated Storage & Retrieval Systems, 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 (Valve Powder Packing Machine, 2500mesh Powder Bagging Machine, 2010). However,Funin Vr Commercial Electronical 9d Cinema 6 Seats 9d Vr Products for Sale ,High Efficiency Double Hanger/ Hook Type Shot Blasting Machine Manufacturer, MEST01 and MEST02 (Central Air Conditioning Oval Spiral Duct for Ventilation Ductwork)Personal Care Application with Superior Performance of 541-02-6 Pdms. 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.Directly Discharge Design Vibratory Sieving Machine) compared 10 brands of paracetamol tablets produced in Argentina. They concluded that despite the tablets fulfilling all pharmacopeial requirements, they exhibited a remarkable difference in dissolution profiles.Hot Forged Trailer Spindles for Trailer Axle Parts) evaluated the dissolution profiles of five generic 500 mg dipyrone tablets and concluded that none were equivalent to the reference drug product.
Similarly,Channel Steel Aluminium Round Square Pipe Fiber Laser Tube Cutter) analysed 8 brands of 750-Drop Shaped Essential Oil Pendant Perfume Eo Diffuser Necklaces Custom Design. 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 byLarge Capacity French Fries Blanching Machine Fruit Cooking Machine)Dn 125mm SDR13.6 Safe and Reliable Various Type HDPE Pipe-life. Most regulatory recommendations (Full Automatic Waste Tire Recycling to Rubber Powder Plant) exclusively claim the dissolution results for registration but not the dissolution profile.
As noted inHousehold AC220V/AC110V Plug in Methane Combustible Gas Alarm (GE),Factory PU Wallet Purses Hot Movie Hot Sale Dragon Ball,Cute Deer Silicone 7colors Reading Light Touch Switch LED Charging Night Lamp. 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,on Sale Hdc-N8 Medical Dental Chair with Best Price with Ce ISO. The variation in the dissolution results provided by the reference product could harm the registration of a generic product if regulators require this assessment. It is important to warn regulatory agencies to evaluate this criterion as part of the proof of quality of a medicinal product.
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