If your symptoms do not improve within a few days or if they become worse, check with your doctor.
If you are using Acyclovir for genital herpes, begin using it as soon as you notice symptoms (pain, burning, blisters) of an infection.
Use a condom during sexual intercourse. Before you begin taking any new medicine, either prescription or over-the-counter, check with your doctor or pharmacist.
Special Information if You
Are Pregnant or Breast-feeding
If you plan on becoming pregnant, discuss with your doctor the benefits and risks of using Acyclovir during pregnancy. If you are or may be pregnant, check with your doctor for instructions on using Acyclovir during pregnancy.
Acyclovir is excreted in breast milk. If you are or will be breast-feeding while you are using this medicine, check with your doctor or pharmacist to discuss the risks to your baby.
Possible Acyclovir Side Effects
Side effects cannot be anticipated. If any develop or change in intensity, inform your doctor as soon as possible.
More common Acyclovir side effects may include: stomach upset, loss of appetite, nausea, vomiting, diarrhea, headache, dizziness or weakness. These effects should disappear in a few days as your body adjusts to Acyclovir.
Less common Acyclovir side effects may include: numbness or tingling of the hands or feet, leg pain, sore throat, skin rash, change in the amount of urine.
Symptoms of an Acyclovir allergic reaction include: rash, itching, swelling, dizziness, trouble breathing.
Important
Take your Acyclovir prescription as prescribed.
