Formulation and evaluation of extended-release floating tablets of labetalol hydrochloride 200 mg

KODANDA BHAVANA *, M. SUNITHA REDDY, K. HARI KRISHNA, K. ANIE VIJETHA and APPIDI VIJAY

Department of Pharmaceutics, Centre for Pharmaceutical Sciences, UCESTH, Jawaharlal Nehru Technological University Hyderabad, Kukatpally, Hyderabad, Telangana-500085, India.
 
Research Article
International Journal of Science and Research Archive, 2024, 12(02), 2597–2608
Article DOI: 10.30574/ijsra.2024.12.2.1544
Publication history: 
Received on 10 July 2024; revised on 21 August 2024; accepted on 23 August 2024
 
Abstract: 
The aim of present work is to formulate and evaluate extended-release floating tablets of Labetalol HCL to improve the bioavailability, Patient compliance and solubility on oral floating drug of Labetalol HCL. Labetalol HCL is mainly used in the treatment of hypertension, which is BCS Class Ⅰ drug i.e. Highly soluble and highly permeable.
The tablets were prepared by wet granulation method by using different concentrations of HPMC polymer. The tablets were evaluated for Preformulation characteristics, Pre compression parameters and post compression parameters. In-vitro dissolution studies were performed for all prepared formulations by using dissolution test apparatus employing a paddle stirrer at 50 rpm and 37 ± 0.5°C, 0.1N HCL buffer was used as dissolution medium. Samples of 5ml each were withdrawn at different time intervals. Each sample withdrawn was replaced with an equal amount of fresh dissolution medium. Samples were diluted and assayed at 302 nm using Agilent UV Visible double beam spectrophotometer. The increased drug release is due to the presence of low concentration of HPMC K4 m.
The drug release kinetics was calculated for all the formulations, among all the formulations F8 was taken as optimized formulation whose percentage drug release was found to be 96%. It   indicates the release follows zero order and Hixon kinetics. Hence formulation F8 was Considered as the optimized batch and stability studies were conducted at 40oc±2oc/75±5%RH, Storage condition for 3 months and no change was observed.
 
Keywords: 
Labetalol HCL; Wet granulation; Floating systems; Hypertension; BCS class
 
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