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KAT PHR 49
Antivirals
Question | Answer |
---|---|
Anti herpes drugs typical mechanisms | activated by kinases, inhibit polymerase |
Acyclovir is derived from | guanosine |
Acyclovir is used for | HSV and VZV |
Acyclovir mechanism of action (2) | DNA polymerase inhibition, chain termination |
Acyclovir is not effective against | TK – strains |
Acyclovir is excreted via | renal |
Acyclovir toxicity (2) | renal and CNS |
Valacyclovir is a | longer lasting acyclovir |
Penciclovir | blocks polymerase DOES NOT terminate chain |
Famciclovir is a | prodrug activated in liver |
Docosanol is a | alchohol, inhibits HSV and plasma envelope fusion |
Ganciclovir derived from | guanine |
Ganciclovir mechanism | chain termination, DNA polymerase block |
Ganciclovir used for CMV how | intraocular implant for retinitis |
Ganciclovir toxicity is | Bone marrow suppression, systemic, leukopenia, thrombocytopenia |
Cidofovir mechanism | inhibit DNA polymerase, does not require kinase |
Cidofovir toxicity | nephrotoxic |
Foscarnet toxicity | nephrotoxic, CNS effects |
HSV drugs (4) | acyclovir, valacyclovir, penciclovir and famciclovir (-cyclovir) |
CMV drugs (4) | Ganciclovir, valganciclovir, cidofovir, foscarnet (-gangcylcovir) |
Anti Hepatitis drugs | interferon, adefovir-dipivoxil, entecavir, lamivudine and ribavirin |
IFN a mechanism | activates RNAase, degrades RNA |
Anti hepatitis drug mechanisms | inhibit polymerase |
IFN a toxicity | myalgia, depression, alopecia, flu like |
Adefovir toxicity | lactic acidosis, renal tox, hepatic tox |
Ribavirin toxicity | teratogen, anemia |
Anti influenza drugs | amantadine, rimantadine, oseltamivir, zanamivir |
Amantidine and rimantadine mechanism | block M2 protien channel |
oseltamivir and Zanamivir mechanism | inhibit neuraminidase |
oseltamivir toxicity | GI |
Zanamivir toxicity | bronchospasm in asthma |
NRTI means | nucleotide reverse transcriptase inhibitor |
NRTI mechanism | inhibit reverse transcriptase after phosphorylation |
NRTI examples | abacavir, didanosine, emtricitabine , -ine |
Zidovudine toxicity | bone marrow suppression |
Abacavir toxicity | hypersensitivity |
Didanosine toxicity | pancreatitis |
Stavudine and zalcitabine toxicity | peripheral neuropathy |
NNRTI means | non nucleoside reverse transcriptase inhibitor |
NRTI are metabolized by | P450, hepatic |
NNRTI mechanism | inhibit reverse transcriptase w.out phosphorylation |
NNRTI examples (4) | delavirdine, efavirenz, etravirine, nevirapine |
Delavirdine and nevirapine toxicity | rash, liver enzyme elevation |
Efavirenz toxicity | teratogen |
Protease inhibitors mechanism | inhibit protein processing |
Protease inhibitor examples | atazanavir, darunavir,( -navir) |
Indinavir toxicity | kidney stone, hyperbilirubinemia |
Amprenavir toxicity | rash |
Atazanavir, fosamprenavir, lopinavir, nelfinavir, saquinavir toxicity | GI distress |
Atazanavir toxicity | peripheral neuropathy |
Enfuvirtide mechanism | block membrane fusion |
Maraviroc mechanism | CCR5 receptor antagonist |
Enfuvirtide toxicity | hypersensitivity |
Maraviroc toxicity | joint and muscle pain, diarrhea, liver enzymes high |