Warnings/Precautions

Do not take Aciclovir if you are allergic to any ingredient in the drug.

Certain drugs can interact with Aciclovir and hence, mention clearly to your doctor or pharmacist all medicines, dietary supplements and herbal prescriptions that you are taking, especially any of the following.

If you are pregnant or suspect that you are, then stop using Aciclovir. It is unknown whether Aciclovir is secreted in breast milk. Avoid breast feeding while using the drug.

Discuss with your doctor any prior medical condition that you may have including kidney disorders.

Cetain medicines like aminoglycoside antibiotics [eg, gentamicin], amphotericin B, cyclosporine, nonsteroidal anti-inflammatory drugs [NSAIDs] [eg, ibuprofen], tacrolimus, vancomycin) can harm the kidney. Refrain from using these drugs while taking Aciclovir.

Possible Side Effects

The common side effects include diarrhea, general body discomfort, headache and nausea/vomiting. Seek medical attention if these symptoms become bothersome.

In extreme cases, there can be a severe allergic reaction showing symptoms like rash, hives, itching, tightness in the chest, difficulty in breathing, seizures, swelling on the face, mouth and lips, aggressive behavior, blood in the urine, confusion, decreased consciousness, decreased urination, hallucinations, lower back pain, mental or mood changes, red, swollen, blistered and severe stomach pain.

Seek medical attention immediately if these side effects occur.