Antiviral Agents Flashcards
What are viruses that respond well to antiviral therapy?
-influenza A and some respiratory viruses
-herpes viruses
-cytomegalovirus (CMV)
-HIV that causes acquired-immune deficiency syndrome (AIDS)
-hepatitis B and C
Antivirals across the lifespan of children
-More severe reactions expected
-No proven safety for many; extreme caution should be used
-Doses should be calculated by weight
-Monitor closely
particularly vulnerable to the effects on the kidneys, bone marrow, and liver
Antivirals across the lifespan of adults
-Antibiotics won’t work for viral infections
-Drugs do not cure the disease (no cure for HIV)
-Caution in pregnancy
-Advise childbearing women to use contraceptives
Antivirals across the lifespan of older adults
-More susceptible to adverse effects; monitor closely
-Hepatic/renal dysfunction may be worsened by these medications
-Dose may need to be lowered
What are the Agents used for Influenza A and Respiratory Viruses?
● Amantadine - influenza A, West Nile virus, and Parkinson’s disease
●Oseltamivir - influenza A & B ( can reduce severity if taken shortly after symptoms begin)
●Peramivir - acute influenza (IV med for patients who cannot take oral antiviral meds)
●Rimantadine - influenza A
●Zanamivir - Influenza A & B (inhaled med)
Agents for Influenza A and Respiratory Viruses
What are the indications?
Treatment and reduction of severity of respiratory viruses and influenza
Agents for Influenza A and Respiratory Viruses
What are the actions?
prevents viral replication
Agents for Influenza A and Respiratory Viruses
What are the contraindications?
Allergy, renal impairment, pregnancy, or lactating
Agents for Influenza A and Respiratory Viruses
What are the adverse effects?
Dizziness, insomnia, nausea, orthostatic hypotension and urinary retention; peramivir associated with Stevens-Johnson Syndrome
these influenza agents have an effect on dopamine levels - so they can cause some disturbances and mood and sleep patterns
Nursing considerations for patients receiving agents for influenza A and respiratory viruses
Assessment:
-Assess for contraindications or cautions (asking pts for any liver or kidney problems)
-Perform a physical assessment
-Assess for orientation and reflexes; vital signs; urinary output; and skin
-Monitor renal and hepatic function tests
-Assess mood, anxiety, sleep
-Monitor BP for orthostatic hypotension
Nursing considerations for patients receiving agents for influenza A and respiratory viruses
Nursing diagnoses:
-Impaired comfort related to GI, CNS, or GU effects of the drug
-Altered sensory perception (kinesthetic) related to CNS effects of the drug
-Knowledge deficit regarding drug therapy
Nursing considerations for patients receiving agents for influenza A and respiratory viruses
Implementation:
-Start the drug regimen as soon after exposure to the virus as possible, usually within 2 days of the start of symptoms
-Administer influenza A vaccine before the flu season begins, if at all possible
-Administer the full course of the drug
-Provide safety provisions if CNS effects occur
-Instruct the patient about the appropriate dosage-scheduling regimen; safety
precautions
Nursing considerations for patients receiving agents for influenza A and respiratory viruses
Evaluation:
-Monitor patient response to the drug (prevention of respiratory flulike symptoms, alleviation of flulike symptoms).
-Monitor for adverse effects (changes in orientation and affect, blood pressure, urinary output, skin changes, and/or liver or renal function test changes).
-Determine the effectiveness of the teaching plan. The patient should be able to name the drug, dosage, possible adverse effects to watch for, and specific measures to help to avoid or minimize adverse effects.
-Monitor the effectiveness of comfort and safety measures and adherence to
Agents for Herpes and Cytomegalovirus
Drug names/ suffixes?
(-clovir)
●Acyclovir - genital herpes, cold sores, chicken pox and shingles
●Ganciclovir - cytomegalovirus (CMV) (organ transplant, HIV, AIDS pts)
●Valacyclovir - genital herpes, cold sores and shingles
●Valganciclovir - treat and prevent cytomegalovirus (CMV) (organ transplant, HIV, AIDS pts)
Agents for Herpes and Cytomegalovirus (-clovir)
What are the actions/ indications?
Inhibit viral DNA replication; treatment of HSV and CMV
Agents for Herpes and Cytomegalovirus (-clovir)
What are the contraindications?
-Known allergy, highly toxic in pregnancy and lactation and renal disease, severe CNS disorders (Alzheimer’s, stroke, Parkinson’s, multiple sclerosis, or epilepsy should not take these drugs)
Agents for Herpes and Cytomegalovirus (-clovir)
What are the adverse effects?
Nausea, vomiting, headache, rash, and hair loss, paresthesias, neuropathy and renal dysfunction
Agents for Herpes and Cytomegalovirus (-clovir)
What are the drug-drug interactions?
Nephrotoxic drugs, zidovudine
Nursing Considerations for Patients Receiving Agents for Herpes Virus and CMV
Assessment:
-Assess for contraindications and cautions (renal or neurological disorders)
-Perform a physical assessment
-Assess orientation and reflexes
-Examine skin (color, temperature, and lesions)
-Evaluate renal function tests
Nursing Considerations for Patients Receiving Agents for Herpes Virus and CMV
Nursing diagnoses:
-Impaired comfort related to GI, CNS, or local effects of the drug
-Impaired sensory (kinesthetic) perception related to CNS effects of the drug
-Knowledge deficit regarding drug therapy
Nursing Considerations for Patients Receiving Agents for Herpes Virus and CMV
Implementation:
-Administer the drug ASAP after the diagnosis has been made
-Ensure good hydration (reduce risk of kidney damage)
-Ensure that the patient takes the complete course of the drug regimen
-Wear protective gloves when applying the drug topically
-Provide safety precautions
-Warn the patient that GI upset, nausea, and vomiting can occur
-Monitor renal function tests periodically during treatment
-Provide patient teaching
Nursing Considerations for Patients Receiving Agents for Herpes Virus and CMV
Evaluation:
-Monitor patient response to the drug (alleviation of signs and symptoms of herpes or CMV infection).
-Monitor for adverse effects (orientation and affect, GI upset, and renal function).
-Evaluate the effectiveness of the teaching plan. The patient should be able to name the drug, dosage, possible adverse effects to watch for, and specific measures to help avoid adverse effects.
-Monitor the effectiveness of comfort and safety measures and
adherence to the regimen
Agents for HIV and AIDS
What are the drugs in this class?
●Nonnucleoside reverse transcriptase inhibitors
- Delavirdine, Efavirenz, Nevirapine
●Nucleoside reverse transcriptase inhibitors (NRTIs)
-Abacavir, Emtricitabine, Lamivudine, Tenofovir, Zidovudine
●Protease inhibitors
-Darunavir, Fosamprenavir, Lopinavir, Ritonavir, Tipranavir
●Fusion inhibitors
-Enfuvirtide
●CCR5 coreceptor antagonists
-Maraviroc
●Integrase strand transfer inhibitors
-Dolutegravir, raltegravir
Nonnucleoside Reverse Transcriptase Inhibitors (NNRTIs)
What drugs are in this class?
●Delavirdine
●Efavirenz
●Nevirapine
Nucleoside Reverse Transcriptase Inhibitors (NRTIs)
What drugs are in this class?
●Abacavir
●Emtricitabine
●Lamivudine
●Tenofovir
●Zidovudine
Protease Inhibitors (-navir)
What drugs are in this class?
●Darunavir
●Fosamprenavir
●Lopinavir
●Ritonavir
●Tipranavir
Fusion Inhibitors
What drugs are in this class?
Enfuvirtide
CCR5 Coreceptor Antagonist
What drugs are in this class?
Maraviroc
Integrase Strand Transfer Inhibitors (-gravir)
What drugs are in this class?
●Dolutegravir, raltegravir
Drug class: NNRTI
What are the actions/indications?
Action/Indications – Bind directly to HIV reverse transcriptase,
blocking both RNA- and DNA-dependent DNA polymerase activities
Drug class: NNRTI
What are the contraindications?
Allergy, pregnancy and lactation
Drug class: NNRTI
What are the adverse effects?
dry mouth, abdominal pain, n/v, constipation,
diarrhea, dizziness, blurred vision, headache, flu-like syndrome
Drug class: NNRTI
What are the drug-drug interactions?
Too many to list consult a resource before adding any new meds to pts regimen
Drug class: NRTI
What are the actions/indications?
Action/Indications – Compete with naturally occurring nucleosides within the cell that the virus would use to build the DNA chain. (For HIV)
preferred method f treatment for pregnancy
Drug class: NRTI
What are the contraindications?
Allergy, lactation