Acyclovir Oral

Acyclovir Oral Side Effects

Headache, nausea, vomiting, and diarrhea may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.

Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

Tell your doctor immediately if any of these unlikely but serious side effects occur:

• dizziness
• drowsiness

Tell your doctor immediately if any of these rare but very serious side effects occur:

• unusual tiredness
• fast/pounding heartbeat
• easy bruising/bleeding
• new signs of infection (e.g., fever, persistent sore throat)
• bloody/dark urine
• severe stomach/abdominal pain
• yellowing eyes/skin
• change in the amount of urine
• mental/mood changes (e.g., agitation, confusion, hallucinations)
• loss of consciousness
• vision changes
• seizures

A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any symptoms of a serious allergic reaction, including:

• rash
• itching/swelling (especially of the face/tongue/throat)
• severe dizziness
• trouble breathing

This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

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Drug Interactions