Dapivirine Bioadhesive Vaginal Tablets Based on Natural Polymers for the Prevention of Sexual Transmission of HIV



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Cazorla Luna, Raúl and Martín Illana, Araceli and Notario Pérez, Fernando and Bedoya del Olmo, Luis Miguel and Ruiz Caro, Roberto and Bermejo Benito, Paulina and Veiga Ochoa, María Dolores (2019) Dapivirine Bioadhesive Vaginal Tablets Based on Natural Polymers for the Prevention of Sexual Transmission of HIV. Polymers, 11 (3). p. 483. ISSN 2073-4360

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Official URL: https://doi.org/10.3390/polym11030483


Young sub-Saharan women are a group that is vulnerable to the sexual transmission of HIV. Pre-exposure prophylaxis through vaginal microbicides could provide them an option for self-protection. Dapivirine has been demonstrated to have topical inhibitory effects in HIV, and to provide protection against the sexual transmission of this virus. This paper reports on the studies into swelling behaviour, bioadhesion and release carried out on dapivirine tablets based on chitosan, locust bean gum and pectin, to select the most suitable formulation. The modified simulated vaginal fluid led to a high solubility of dapivirine and allowed the dapivirine release profiles to be characterized in sink conditions; this aqueous medium is an alternative to organic solvents, which are not a realistic option when evaluating systems whose behaviour varies in aqueous and organic media. Of the formulations evaluated, dapivirine/pectin tablets containing 290 mg of polymer and 30 mg of dapivirine present the most moderate swelling, making them the most comfortable dosage forms. Their high bioadhesive capacity would also allow the formulation to remain in the action zone and release the drug in a sustained manner, pointing to this formulation as the most promising candidate for future evaluations of vaginal microbicides for the prevention of HIV.

Item Type:Article
Uncontrolled Keywords:HIV vaginal preexposure prophylaxis; Dapivirine controlled release; Bioadhesive vaginal tablets; Pectin; Locust bean gum; Chitosan
Subjects:Medical sciences > Medicine > Communicable diseases
Medical sciences > Pharmacy > Pharmacology
Medical sciences > Pharmacy > Pharmaceutical technology
ID Code:70298
Deposited On:10 Feb 2022 10:59
Last Modified:10 Feb 2022 12:22

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