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Shanmugam, S.
- Design and In Vitro Studies of Ambroxol Hydrochloride Sustained Release Matrix Tablets
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Authors
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1 Department of Pharmaceutics. Adhiparasakthi College of Pharmacy, Melmarvathur-603 319, Tamilnadu, IN
1 Department of Pharmaceutics. Adhiparasakthi College of Pharmacy, Melmarvathur-603 319, Tamilnadu, IN
Source
Research Journal of Pharmaceutical Dosage Form and Technology, Vol 3, No 2 (2011), Pagination: 47-51Abstract
In the present investigation, an attempt was made to formulate the oral sustained release matrix tablets of Ambroxol HCl in order to improve efficacy, reduce the frequency of administration, and better patient compliance. Ambroxol Hydrochloride is a potent mucolytic agent capable of inducing bronchial secretions used in the treatment of respiratory disorders. Differential scanning calorimetric analysis confirmed the absence of any drug polymer interaction. Matrix tablets of Ambroxol Hydrochloride were formulated employing hydrophilic polymers HPMC K100M, Carbopol 934P and hydrophobic polymer Ethyl cellulose as release retardant polymers. The powder blend was evaluated for micromeritic properties. The sustained release matrix tablets were prepared by direct compression technique. The tablets were evaluated for thickness, diameter, weight variation test, hardness, friability, and drug content. The in vitro drug release characteristics were studied in simulated gastric fluid (2 hours) and intestinal fluid for a period of 6hours using USP type II dissolution apparatus (total 8hours). The results of dissolution studies indicated that formulation F3 (drug to polymer 1:1.06), the most successful of the study and exhibited satisfactory drug release in the initial hours and the total release was very close to the theoretical release profile. Matrix tablet containing HPMC K 100M (F3) formulation were found to show good initial release (14.8% in 2 hrs) and extended the release (90% in 11 hrs). The n value for F3 obtained from Korsmeyer - peppas model confirmed that the drug release was anomalous diffusion mechanism.Keywords
Ambroxol HCl, Hydroxypropyl Methylcellulose, Carbopol 934P, Ethyl Cellulose.- Design and Evaluation of Novel Ophthalmic Delivery System of Aciclovir for Herpes Simplex Infection
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Authors
Affiliations
1 Adhiparasakthi College of Pharmacy, Melmaruvathur – 603 319, Tamilnadu, IN
2 Adhiparasakthi College of Pharmacy, Melmaruvathur – 603 319 Tamil Nadu, IN
3 Adhiparasakthi College of Pharmacy, Melmaruvathur – 603 319, Tamil Nadu, IN
1 Adhiparasakthi College of Pharmacy, Melmaruvathur – 603 319, Tamilnadu, IN
2 Adhiparasakthi College of Pharmacy, Melmaruvathur – 603 319 Tamil Nadu, IN
3 Adhiparasakthi College of Pharmacy, Melmaruvathur – 603 319, Tamil Nadu, IN
Source
Research Journal of Pharmaceutical Dosage Form and Technology, Vol 3, No 2 (2011), Pagination: 52-56Abstract
Aciclovir, an antiviral is effective against human Herpes Simplex viruses, commercially available as a 3 % w/w eye ointment to be applied 5 times a day in the eye. The poor therapeutic response exhibited by conventional ophthalmic ointments due to rapid precorneal elimination of the drug may be overcome by the use of an ocusert inserted in the cul-de-sac of lower eye lid. Inserts containing Aciclovir were prepared by using solvent casting method. Drug reservoir and rate controlling membrane were prepared using different hydrophilic and hydrophobic polymers respectively with Poly Ethylene Glycol 400 as the plasticizer. DSC and IR spectral studies were performed to confirm the interaction of drug and polymers in formulation. The ocuserts were evaluated for their physico chemical properties, mechanical properties and in-vitro release characteristics. A zero order release formulation VI was subjected to UV irradiation for sterilization. The developed formulation was stable, sterile and non-irritant.Keywords
Aciclovir, Ocusert, Diffusion, Polymers.- Formulation and Evaluation of Sustained Release Matrix Tablet of Zidovudine Using Different Polymers
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Authors
Affiliations
1 Adhiparasakthi College of Pharmacy, Melmaruvathur-603 319, Tamilnadu, IN
1 Adhiparasakthi College of Pharmacy, Melmaruvathur-603 319, Tamilnadu, IN