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Acyclovir
Acyclovir is used to treat, or prevent infections from oral and genital herpes, or varicella-zoster viruses. These are also known as cold sores, sexually transmitted herpes, chicken-pox, and shingles.
General Information
This database does not contain every known side effect, adverse effect, or drug interaction. If you have questions about your medicines, contact your health care provider. This information is for educational purposes only.
How Drug Works
Acyclovir stops the replication of herpes viruses by blocking the formation of its genetic materials.
How Taken
This medicine is taken orally and may be taken by mouth with food in stomach upset occurs. For herpes outbreaks, patients are generally given 800 mg 5 times daily for 7 to 10 days. For repeat infections doses are usually 200 mg given 5 times daily for 5 days. This medicine comes in an ointment form. The ointment is used on the affected area usually every 3 hours ( 6 times per day) for 7 days. Take the full course of this medicine as directed.
Possible Side Effects
Some common side effects reported with this medicine include:
- insomnia
- headache
- feeling tired
- stomach upset
- rash
If you experience other bothersome side effects, contact your health care provider.
Warnings/Precautions
Patients with a history of liver or kidney disease and with existing neurological problems should use this medicine with with caution.
Overdose
For emergencies, seek medical attention immediately. For non emergencies, contact your local or regional poison control center at 1-800-222-1222.
Drug Interactions
Acyclovir may interact with other drugs used to treat viral infections. Talk to your pharmacist or physician if you are taking this with other drugs.
Missed Dose
Take your next dose as soon as you remember. If it is time for your next dose, skip the missed dose and go back to your regular schedule. Do not double doses.
Storage
Keep Acyclovir in the container it came in, tightly closed, and out of reach of children. Throw away any medication that is outdated or no longer needed. Store it at room temperature and away from excess heat and moisture (not in the bathroom).
Pregnancy/Nursing
Talk to your doctor or pediatrician before using this medicine while nursing. Use during pregnancy should only occur if the potential benefits outweigh the possible risk to the fetus.
More Information
For more information, talk to your doctor, pharmacist or health care provider.
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