Effect of Hydrophilic Polymers on the Release Rate and Pharmacokinetics of Acyclovir Tablets Obtained by Wet Granulation: In Vitro and In Vivo Assays.

This study aims to evaluate the feasibility of producing acyclovir-containing modified release matrix tablets by a wet granulation method based on the type and concentration of two pharmaceutical-grade hydrophilic matrix polymers (i.e., hydroxypropyl methylcellulose (HPMC), carbomers, and their combinations) commonly used in biomedical applications.

Recent Patents of Pharmaceutical Co-Crystals: Product Development on Anti-Cancer Drugs and Beyond.

Background: Scientists, academicians, and researchers from academics and the pharmaceutical industries have all expressed interest in the design and production of pharmaceutical cocrystals in recent years. The development of novel drug products with enhanced physicochemical and pharmacological characteristics is aided by the cocrystallization of drug substances.

Objective: The major problem with drug candidates is their solubility and bioavailability, which may be solved with the appropriate molecular modifications.

Mini Review on Forced Degradation Studies on Anti-Epileptic Drugs and Beyond.

In this review on the forced degradation studies on anti-epileptic drugs and the development of validated stability-indicating assay methods for drug substances and products at a condition more severe than accelerated condition (i.e. 40 ± 2°C, 75 ± 5% relative humidity), the drug substance and drug product undergo degradation is known as forced or stress degradation.

New stability chiral RP-HPLC method for degradation products determination in midodrine hydrochloride.

Enantiomeric resolution of the drug and complete separation from its degradation products was successfully achieved on a PAK IG-3 (150 × 4.6 mm i.d.

A systematic approach for stability-indicating HPLC method optimization for Nilotinib bulk through design of experiments: Application towards characterization of base degradation products by mass spectrometry.

A novel and reliable stability-indicating high-performance liquid chromatography method was developed using design of experiments. Under forced degradation conditions (hydrolysis, oxidative, photolytic and thermal) Nilotinib produced five major degradation products utilizing sodium hydroxide in base hydrolysis. The degradation products were separated by Hypersil ODS column (150×4.

Potential Role of In Vitro-In Vivo Correlations (IVIVC) for the Development of Plant-Derived Anticancer Drugs.

Background: Conventional medicines, along with herbal formulations of Chinese, serve as the primary source and hub of active new drugs where the initial research concentrates on the extraction and isolation of bioactive lead compound(s) to treat several diseases largely for cancer. Plant-derived natural products and their analogs reveal a significant source of several clinically useful anticancer agents. Herbs and herbal derived active compounds play an unavoidable role in the treatment, drug discovery and delivery for decades, as evidenced by numerous existing marked drugs and various cancer-related molecular targets in clinical development.

Physicochemical, pharmacokinetic, and pharmacodynamic characterization of isradipine tablets for controlled release.

Isradipine is a dihydropyridine calcium channel blocker (CCB) commonly used as vasodilator with antihypertensive properties. A remote-controlled release formulation for isradipine would substantially improve the clinical outcomes of the patients requiring chronic long-term treatment. In this work, sustained release (SR) tablets of isradipine, composed of hydroxypropylmethyl cellulose (HPMC), have been produced by wet granulation and their and characterization was compared to a conventional tablet dosage form of immediate release (IR) as preliminary assessment.

Review of pesticide residue analysis in fruits and vegetables. Pre-treatment, extraction and detection techniques.

A wide variety of pesticides have been used in agriculture to increase the yield, quality and extend the storage life of crops. However, the use of pesticide has been increased now a day due to the ever-increasing population and rapid urbanization. The continuous uses of these pesticides have resulted in contamination of the environment, crops and also caused potential risk to human health.

A stability-indicating LC-MS/MS method optimization for Pemetrexed through design of experiments: Identification and characterization of major oxidative degradation product.

A stability-indicating high-performance liquid chromatography method for Pemetrexed bulk was developed and validated as per the ICH guidelines by employing design of experiments methodology equipped with Box-Behnken design. The separation of Pemetrexed and its oxidative degradation product was achieved in isocratic elution mode with Zorbax C column (150 mm x 4.6 mm x5 μm) using 10 mM ammonium acetate (pH 4.

Enantiomeric Separation of Meclizine Hydrochloride in Pharmaceutical Dosage Form by HPLC Method.

Objective: A basic, powerful and isocratic chiral fluid chromatographic technique was created and approved for the enantiomeric partition of meclizine hydrochloride in pharmaceutical dose structure.

Methods: The chromatographic partition was accomplished on Phenomenex® Lux Cellulose 1 (250 mm x 4.6 mm i.

Multivariate response surface methodology assisted modified QuEChERS extraction method for the evaluation of organophosphate pesticides in fruits and vegetables cultivated in Nilgiris, South India.

An effective, simple and sensitive analytical method has been developed employing liquid chromatography coupled with tandem mass spectrometry and validated for estimation of five organophosphate pesticides at trace levels in six fruits and twelve vegetables. Plackett-Burman design and central composite design was used to screen and optimize the significant factors in modified QuEChERS (quick, easy, cheap, effective, rugged and safe) extraction method. The method evaluation was done by matrix-matched calibration with linearity ranging from 5 to 500 µg/L with a correlation coefficient more than 0.

Experimental design in pesticide extraction methods: A review.

The sample extraction process is considered as the essential step in the pesticide residue analysis, as it provides the base for the detection of the pesticides in trace level. Various factors need to be optimized during the extraction of pesticides due to the complexity of the matrix which is time-consuming and tedious. Therefore, the use of experimental design in the optimization process proves to be effective with minimum experiments and cost.

Development of a Forced Degradation Profile of Alosetron by Single Mode Reversed-Phase HPLC, LC-MS, and its Validation.

Determination of alosetron in the presence of its degradation products was studied and validated by a novel HPLC method. The separation of the drug and its degradation products was achieved with the Jones Chromatography C18 analytical column (150 mm x 4.6 mm; 3 µm) with a stationary phase in isocratic elution mode.

Development and validation of dissolution study of sustained release dextromethorphan hydrobromide tablets.

This study describes the development and validation of dissolution tests for sustained release Dextromethorphan hydrobromide tablets using an HPLC method. Chromatographic separation was achieved on a C18 column utilizing 0.5% triethylamine (pH 7.

A Sensitive RP-HPLC Method for Simultaneous Estimation of Diethylcarbamazine and Levocetirizine in Tablet Formulation.

A simple, sensitive and reproducible method was developed and validated for the simultaneous estimation of diethylcarbamazine and levocetirizine in its tablet formulation by reverse phase high performance liquid chromatography using Waters1515 HPLC with UV detector at the λ(max) of 224 nm, using Princeton Sphere-100 C(18) (250×4.6 mm. 5 μ) column.

Determination of deflazacort in human plasma by liquid chromatography-mass spectrometry after liquid-liquid extraction and its application in human pharmacokinetics studies.

Purpose: A sensitive liquid chromatography-mass spectrometric (LC/MS) has been developed and validated for the quantification of deflazacort in human plasma after liquid-liquid extraction (LLE).

Materials And Methods: Best chromatographic resolution was achieved on a reverse-phase Phenomenex C18 column with the mobile phase of acetonitrile-water (30:70) and isocratic elution resulted in a total run time of about 3.5 min.

Sensitive and accurate estimation of losartan potassium formulation by high-performance thin-layer chromatography.

Aim And Objectives: To develop a simple, sensitive, cost-effective and reproducible UV-spectrophotometric method and validate for the estimation of disodium edetate in topical gel formulations.

Materials And Methods: Solution of disodium edetate reacts with ferric chloride to form complex in 0.1 N HCl giving λmax at 270 nm.

Development and Validation of a HPLC and an UV Spectrophotometric Methods for Determination of Dexibuprofen in Pharmaceutical Preparations.

A high-performance liquid chromatographic (HPLC) and a ultraviolet (UV) methods were developed and validated for the quantitative determination of Dexibuprofen (DI) in pharmaceutical dosage form. HPLC was carried out by reversed phase technique on a RP-18 column with a mobile phase composed of acetonitrile and 0.5% triethylamine (pH 7.

A Validated RP-HPLC Method for Simultaneous Estimation of Nebivolol and Hydrochlorothiazide in Tablets.

A simple, selective, rapid, precise and economical reverse phase high pressure liquid chromatographic method has been developed for the simultaneous estimation of nebivolol and hydrochlorthiazide from pharmaceutical formulation. Phenomenex Gemini C(18) (25 cm×4.6 mm i.

Formulation and evaluation of dextromethorphan hydrobromide sustained release tablets.

Sustained release (SR) matrix tablets of dextromethorphan hydrobromide were prepared by wet granulation using hydroxypropyl methyl cellulose (HPMC-K-100 CR) as the hydrophilic rate controlling polymer. The effect of the concentration of the polymer and different fillers on the in vitro drug release rate was studied. The studies indicated that the drug release can be modulated by varying the concentration of the polymer and the fillers.

Synthesis, antiviral, antituberculostic and antibacterial activities of some novel, 4-(4'-substituted phenyl)-6-(4"-hydroxyphenyl)-2-(substituted imino) pyrimidines.

A variety of novel 4-[(4'-substituted phenyl)-6-(4"-hydroxyphenyl)-2-substituted imino] pyrimidines were synthesized by reacting 4-(4'-substituted phenyl)-6-(4"-hydroxyphenyl)-2-aminopyrimidines with different substituted aromatic aldehydes, with coumarin and with chloroisatin. The 4-(4'-chlorophenyl)-6-(4"-hydroxyphenyl)-2-aminopyrimidines were synthesized by reacting 3-(4'-substituted phenyl)-1-(4"-hydroxyphenyl)-2-propen-1-ones with guanine hydrochloride. The 3-(4'-substituted phenyl)-1-(4"-hydroxyphenyl)-2-propen-1-ones were synthesized by reacting 4-hydroxyacetophenone with different para substituted aromatic aldehydes.

HPTLC method for the simultaneous determination of amlodipine and benazepril in their formulations.

A new, simple, precise, rapid, and selective high-performance thin-layer chromatographic (HPTLC) method is developed for the simultaneous analysis of amlodipine and benazepril in pharmaceutical formulations. The method uses zolpidem as an internal standard (IS). The stationary phase used is silica gel 60 F254 prewashed with methanol.