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18 Cards in this Set
- Front
- Back
Antiviral Agents include:
a. b. c. d. e. f. |
Antiviral Agents include:
a. Acyclovir b. Famciclovir c. Valacyclovir d. Ganciclovir e. Foscarnet f. Cidofovir |
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Acyclovir
method of action: |
Acyclovir
method of action: Inhibits viral DNA synthesis; toxic to cells infected with virus, but not to normal host cells *Spectrum: active against Herpes simplex virus (HSV) types I and II (genital), herpes zoster, varicella |
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Acyclovir
pharmacotherapy: |
Acyclovir
pharmacotherapy: a. Topical b. Oral c. IV |
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Acyclovir
safety profile: |
Acyclovir
safety profile: a. headache, dizziness b. local irritation with topical preparatoin, IV site c. n/v/d d. nephrotoxicity: IV form, if given over less than 10 minutes or with inadequate hydration |
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Famciclovir
method of action: |
Famciclovir
method of action: Prodrug that is biotransformed into active compound PENCICLOVIR which inhibits viral DNA synthesis *Spectrum: Herpes virus I and II and varicella zoster |
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Famciclovir
safety profile: |
Famciclovir
safety profile: *carcinogenic in rats; impaired fertility in male animals |
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Valacyclovir
method of action: |
Valacyclovir
method of action: prodrug that is biotransformed to acyclovir *Spectrum: see acyclovir- active against Herpes simplex virus (HSV) types I and II (genital), herpes zoster, varicella |
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Ganciclovir
method of action: |
Ganciclovir
method of action: inhibits viral DNA replication *Spectrum: Active against herpes viruses, including CYTOMEGALOVIRUS (CMV) |
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Ganciclovir
pharmacotherapy: |
Ganciclovir
pharmacotherapy: a. Treatment of CMV infections, including retinitis in AIDS b. Prevention of CMV disease in transplant recipients |
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Ganciclovir
safetey profile: |
Ganciclovir
safetey profile: a. HEMATOPOIETIC: granulocytopenia (40%), thrombocytopenia (20%), anemia (2%) b. Pain, phlebitis at injection site c. Elevated liver function tests d. CARCINOGENESIS: demonstrated in mice, potentially carcinogenic in humans e. Drug interactions - zidovudine, amphotericin B. antineoplastics, flucytosine - increased bone marrow suppression |
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Ganciclovir
Valganciclovir (Valcyte)info: |
Ganciclovir
Valganciclovir (Valcyte)info: new tablet option for oral therapy *PRODRUG OF GANCICLOVIR- metabolized in the liver to ganciclovir *oral bioavailability of valganciclovir far exceeds that of oral ganciclovir- achieves levels similar to IV dosing *can be used for induction AND maintenance therapy |
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Foscarnet
method of action: |
Foscarnet
method of action: Inhibits viral replication by binding to DNA polymerases and reverse transcriptase |
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Foscarnet
pharmacokinetics: |
Foscarnet
pharmacokinetics: a. deposits in bone b. eliminated renally |
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Foscarnet
pharmacotherapy: |
Foscarnet
pharmacotherapy: a. Treatment of CMV disease, including retinitis in AIDS b. Active against other herpes viruses, including ACYCLOVIR-RESISTANT strains |
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Cidofovir
method of action: |
Cidofovir
method of action: inhibits viral DNA replication |
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Cidofovir
pharmacokinetics: |
Cidofovir
pharmacokinetics: a. long intracellular half-life allows biweekly dosing b. renally excreted |
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Cidofovir
pharmacotherapy: |
Cidofovir
pharmacotherapy: management of CMV retinitis |
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Cidofovir
safety profile: |
Cidofovir
safety profile: a. Nephrotoxicity common: prehydration and coadministration of probenicid protects kidney b. Myelosuppression (leukopenia most common) |