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What is Aciclovir?

Aciclovir is an antiviral medicine used to treat infections caused by herpes viruses. It is commonly available as tablets and as a topical cream, and it is widely stocked in online pharmacies. The goal is to shorten the duration of an outbreak and ease symptoms. It is not a cure, but it helps the body clear the virus more quickly when started at the first signs of an outbreak. Always follow the label or your clinician's directions.

How does it work?

The drug is activated inside infected cells and blocks viral DNA replication. This slows the growth of the herpes virus and reduces new lesion formation. The sooner you start treatment, the more the symptoms can be cut short. It is generally more effective when begun at the start of symptoms.

Forms and dosing

Oral tablets are usually 200 mg or 400 mg. Doses depend on the infection, age and kidney function. For cold sores, common courses include 200 mg five times daily for four days. For genital herpes, doctors may prescribe 400 mg three times daily for several days. For shingles, higher doses may be used under medical care. Always follow the instructions on the packaging.

Topical cream

The cream is applied a thin layer to the affected area several times a day. The usual course lasts around four days. Wash hands before and after application and avoid contact with the eyes. Do not cover with occlusive dressings unless advised. The cream can speed healing when used early in an outbreak.

Safety and side effects

Most people tolerate aciclovir well. Common effects include nausea, headache and mild diarrhea. The cream can cause local burning or itching. Rare reactions include skin rash or swelling. Kidney problems can require a dose adjustment. Seek medical help if symptoms worsen, persist beyond a few days, or if you notice severe reactions.

Precautions and interactions

Do not use if you are allergic to aciclovir. Share your medical history with the pharmacist, especially kidney issues or dehydration. Some medicines affecting kidney function can raise aciclovir levels. Tell your doctor about all medicines, including antivirals and immune therapies. Pregnant or breastfeeding women should consult a clinician before use.

Storage and online purchase notes

Store tablets at room temperature away from moisture. Keep the cream in its original packaging. Do not share your medicine. When buying online, choose a licensed pharmacy and check expiry dates and storage guidelines. If symptoms persist after a few days, contact a clinician for advice.