The IR spectra of the microcrystals (Fig. 2) also show the same characteristic bands. From the results obtained from IR spectra it can be concluded that there is no possibility of any interaction, chemical and functional group change during

the processing of the formulation of microcrystals. Intensity of IR peaks of aceclofenac microcrystals were decreased as compared to untreated drug, implying that the change in crystal habit and particle size reduction in microcrystals is responsible for these changes. Particle size determination of the microcrystals was performed out using optical microscopy with a calibrated NLG919 purchase eyepiece micrometer and stage micrometer by taking a small quantity of formulation on the glass slide. About 100 microcrystals were measured individually, average was taken and their size range and average mean diameter was calculated. The solubility studies were

carried out using distilled water. The solubility studies indicate that the crystals prepared using PVP (k-30) has showed highest solubility of the drug in water when compared with the untreated drug. This increase in the solubility is credited to the decrease in particle size by size reduction. Effect of various polymers on the bulk density, tap density, Hausner ratio and Carr’s index is shown in the Table 2. Among the used polymers, HPMC and PVP (k-30) were found to be best in all flow properties. Result of the Carr’s index Fulvestrant in vivo is either an indicative of improved compaction behavior of the prepared microcrystals when compared with that of the untreated drug. The Q10 and Q30 values are represented in Table 3. From the results obtained, it is evident that the onset of dissolution of aceclofenac is low, about 63.09% of the drug

being dissolved in 30 min. The drug microcrystals prepared with polymers exhibited better dissolution rates when compared with that of the untreated drug. The dissolution profile of the pure drug and the polymeric microcrystals explains that the particle size reduction was an effective and versatile option to enhance the rate of dissolution. Microcrystals prepared with PVP (k-30) showed enhanced dissolution rates within 30 min compared to that of untreated drug and microcrystals prepared with other polymers. Among various polymers used PVP (k-30) was proved to be more efficient. All authors have none to declare. The authors thank Sri Ramachandra University, Chennai for providing the necessary research facilities to carry out the work. “
“Mycobacterium tuberculosis is a resilient human pathogen which causes tuberculosis (TB). The modern, standard short-course therapy for TB recommended by World Health Organization (WHO) is based on a combination of at least three first-line anti-TB drug regimen that relies on direct observation of patient compliance to ensure effective treatment. 1 Among the first-line anti-TB agents, isoniazid (INH) is the most prominent drug.