Valacyclovir
Brand: Valtrex
No boxed warning on the current FDA label.
- Caution
- Kidney injury with dehydration or kidney impairment; thrombotic microangiopathy in immunocompromised patients at high doses.
Common side effects
- Headache
- Nausea
- Dizziness
- Abdominal pain
Key interactions
- Additive kidney effects with other nephrotoxic drugs
Counseling points
- Start at the first sign of an outbreak: earlier is far more effective
- Drink plenty of fluid
- Does not cure the virus or prevent transmission entirely
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