ENHANCEMENT OF THE DISSOLUTION RATE AND BIOAVAILABILITY OF PIROXICAM FROM HARD GELATIN CAPSULES AND DIRECT COMPRESSED DISPERSIBLE TABLETS VIA SURFACE HYDROPHILIZATION
Mohammed, F. (2000). ENHANCEMENT OF THE DISSOLUTION RATE AND BIOAVAILABILITY OF PIROXICAM FROM HARD GELATIN CAPSULES AND DIRECT COMPRESSED DISPERSIBLE TABLETS VIA SURFACE HYDROPHILIZATION. EKB Journal Management System, 9(2), 34-43. doi: 10.21608/zjps.2000.181613
Fergany Mohammed. "ENHANCEMENT OF THE DISSOLUTION RATE AND BIOAVAILABILITY OF PIROXICAM FROM HARD GELATIN CAPSULES AND DIRECT COMPRESSED DISPERSIBLE TABLETS VIA SURFACE HYDROPHILIZATION". EKB Journal Management System, 9, 2, 2000, 34-43. doi: 10.21608/zjps.2000.181613
Mohammed, F. (2000). 'ENHANCEMENT OF THE DISSOLUTION RATE AND BIOAVAILABILITY OF PIROXICAM FROM HARD GELATIN CAPSULES AND DIRECT COMPRESSED DISPERSIBLE TABLETS VIA SURFACE HYDROPHILIZATION', EKB Journal Management System, 9(2), pp. 34-43. doi: 10.21608/zjps.2000.181613
Mohammed, F. ENHANCEMENT OF THE DISSOLUTION RATE AND BIOAVAILABILITY OF PIROXICAM FROM HARD GELATIN CAPSULES AND DIRECT COMPRESSED DISPERSIBLE TABLETS VIA SURFACE HYDROPHILIZATION. EKB Journal Management System, 2000; 9(2): 34-43. doi: 10.21608/zjps.2000.181613

ENHANCEMENT OF THE DISSOLUTION RATE AND BIOAVAILABILITY OF PIROXICAM FROM HARD GELATIN CAPSULES AND DIRECT COMPRESSED DISPERSIBLE TABLETS VIA SURFACE HYDROPHILIZATION

Zagazig Journal of Pharmaceutical Sciences
Article 6, Volume 9, Issue 2, December 2000, Page 34-43  XML PDF (4.69 MB)
Document Type: Original Article
DOI: 10.21608/zjps.2000.181613
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Author
Fergany Mohammed email
*Department of Pharmaceutics, Faculty of Pharmacy, Assiut-University, Assiut-Egypt.
Abstract
The dissolution rate of piroxicam, a nonsteroidal anti-inflammatory drug (NSAID) was markedly increased by the surface hydrophilization technique using Tween 80, polyvinylpyrrolidine K-30 (PVP) and polyethylene glycol 4000 (PEG). The in- vitro release of hydrophilized piroxicam from hard gelatin capsules and directly compressed dispersible tablets was tested in 0.1N HCI (pH 1.2) and phosphate buffer (pH 7.4) and was compared with two commercially available formulations of piroxicam (Feldene 20 mg capsules and Feldene 20 mg dispersible tablets, Pfizer Inc., USA). The dissolution rate of hydrophilized piroxicam was higher for PVP and PEG 4000 as compared to Tween 80. Hydrophilized piroxicam tablets gave higher dissolution rates than capsules. The drug release was found to be affected by the pH of the dissolution medium and was higher in pH 7.4 than pH 1.2.
A two-way crossover design was performed to compare the bioavailability of piroxicam. After oral administration of the selected formulations to six healthy individuals, serial blood samples were collected over 24 hours. Piroxicam was determined in the plasma by using high-performance liquid chromatograhy (HPLC). The obtained pharmacokinetic data indicated shorter tmax and higher Cmax for the hydrophilized piroxicam preparations using PVP as compared to the commercial formulations of piroxicam. These results cleary indicate the usefulness of the utilized surface hydrophilization technique for the enhancement of the dissolution rate and bioavailability of piroxicam.
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