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Ensitrelvir is being studied for its potential use as post-exposure prophylaxis (PEP) after SARS-CoV-2 exposure. [19] [20] The SCORPIO-PEP trial is a global Phase 3 trial that will evaluate the safety and efficacy of the drug in preventing symptomatic SARS-CoV-2 infection in household contacts of people who tested positive for COVID-19.
The drug was also shown to reduce the viral load at day 4 in treated patients compared to the placebo group. Side effects were mostly mild and infrequent, with the most common being nausea (1.5% vs. 0.2%) and skin rash (3.3% vs. 0.3%), which occurred more often in the olgotrelvir group.
Ribbon diagram of the protein with the drug shown as sticks. The catalytic residues (His41, Cys145) are shown as yellow sticks. The catalytic residues (His41, Cys145) are shown as yellow sticks. Nirmatrelvir is an antiviral medication developed by Pfizer which acts as an orally active 3C-like protease inhibitor .
A drug combination targeting SARS-CoV-2, Paxlovid, was approved in December 2021 to treat COVID-19. [12] It is a combination of nirmatrelvir , a protease inhibitor targeted to the SARS-CoV-2 3C-like protease , and ritonavir, which inhibits the metabolism of nirmatrelvir, thereby prolonging its effect.
The general idea behind modern antiviral drug design is to identify viral proteins, or parts of proteins, that can be disabled. [11] [13] These "targets" should generally be as unlike any proteins or parts of proteins in humans as possible, to reduce the likelihood of side effects and toxicity. [8]
Nelfinavir belongs to the class of drugs known as protease inhibitors (PIs) and like other PIs is almost always used in combination with other antiretroviral drugs. Nelfinavir is an orally bioavailable human immunodeficiency virus HIV-1 protease inhibitor (K i = 2 nM) and is widely prescribed in combination with HIV reverse transcriptase ...
The safety and efficacy of baloxavir marboxil, an antiviral drug taken as a single oral dose, was demonstrated in two randomized controlled clinical trials of 1,832 subjects where participants were assigned to receive either baloxavir marboxil, a placebo, or another antiviral flu treatment within 48 hours of experiencing flu symptoms. [7]
Enfuvirtide works by disrupting the HIV-1 molecular machinery at the final stage of fusion with the target cell, preventing uninfected cells from becoming infected.A biomimetic peptide, enfuvirtide was designed to mimic components of the HIV-1 fusion machinery and displace them, preventing normal fusion.