Lercanidipine HCl is a novel, third-generation, potent, vasoselective 1, 4- dihydropyridine calcium channel antagonist and a Biopharmaceutical Classification System (BCS) class II drug that aids in preventing hypertension. The final aim of the present work was to promote the solubility of lercanidipine HCl via hydrotrophy and then include it in the in-situ gel formulation. This enhancement of drug solubility was carried out by using citric acid as a hydrotropic agent. Simultaneously, using a mixture of two polymers, namely Poloxamer 407, a thermosensitive polymer with reversible thermal characteristics. Carbopol 940P is a high-viscosity builder exploited for developing in-situ gel. The optimization of preliminary batches of mixtures of both polymers was highly accepted by using 32 factorial designs. F4 was found to be highly optimized, according to all the evaluation parameters and Poloxamer 407 (18% w/v) and Carbopol 940P (0.2% w/v), with drug release of 93.23%. Goat mucosa ex-vivo investigation yielded a value of 79.14% flux at 6 hours. According to ICH guidance, the in-situ Lercanidipine HCl gel has turned up to be stable following a 6-month stability investigation. Thus, the subsequent thermoreversible in-situ gel was scouted to act as a potent nasal distributor with greater bioavailability and patient compliance for the nasal medication.
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