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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.
This conditional early approval system has previously been used in Japan to accelerate the progression to market of other antiviral drugs targeting COVID-19, including remdesivir and molnupiravir. [13] In a study of 428 patients, viral load was reduced, but symptoms were not significantly reduced. [14]
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]
Nirmatrelvir/ritonavir is under investigation, so its side effects have yet to be fully evaluated and may not be completely known. [ 19 ] Other side effects of nirmatrelvir/ritonavir may include hypersensitivity reactions , liver toxicity , and development of HIV drug resistance in people with uncontrolled or undiagnosed HIV infection .
As with many medications targeting reverse transcriptase, body fat redistribution syndrome may occur, causing body fat to center on the upper back and neck, breast, and torso, and potentially decreasing around the legs, arms, and face. [11]
Telaprevir (VX-950), marketed under the brand names Incivek and Incivo, is a pharmaceutical drug for the treatment of hepatitis C co-developed by Vertex Pharmaceuticals and Johnson & Johnson. It is a member of a class of antiviral drugs known as protease inhibitors . [ 3 ]
Common side effects include headache, nausea, yellowish skin, abdominal pain, trouble sleeping, and fever. [2] Severe side effects include rashes such as erythema multiforme and high blood sugar. [2] Atazanavir appears to be safe to use during pregnancy. [2] It is of the protease inhibitor (PI) class and works by blocking HIV protease. [2]
Idoxuridine is an anti-herpesvirus antiviral drug. It is a nucleoside analogue, a modified form of deoxyuridine, similar enough to be incorporated into viral DNA replication, but the iodine atom added to the uracil component blocks base pairing. It is used only topically due to cardiotoxicity. It was synthesized by William Prusoff in the late ...