What is Acyclovir?

Acyclovir is an antiviral medicine that helps manage infections caused by certain viruses, such as herpes simplex and varicella-zoster. It slows the growth and spread of the virus, allowing your immune system to fight the infection more effectively. It does not cure herpes but helps reduce outbreaks, speed up healing, and lower the risk of spreading the virus to others.

Acyclovir Used For

Acyclovir tablets and creams are commonly used to treat cold sores (oral herpes), genital herpes, and shingles (herpes zoster). It can also be prescribed for chickenpox in children and adults with weak immunity. Doctors may recommend it for patients who frequently experience herpes flare-ups to prevent recurrences.

Chemical Composition

The active ingredient in this medicine is Acyclovir, a synthetic purine nucleoside analog. It is available in various forms, including Acyclovir tablet, cream, capsule, and suspension. Inactive ingredients may vary depending on the manufacturer and form of medication.

Acyclovir Mechanism

Acyclovir works by blocking viral DNA replication. After entering infected cells, it is converted to acyclovir triphosphate, which interferes with the viral DNA polymerase enzyme. This prevents the virus from multiplying, helping to control infection spread and reduce symptom severity.

How It Helps Fight Viral Infections

Acyclovir reduces pain, itching, and blistering associated with herpes outbreaks. When used early, it can shorten healing time and lower the risk of new lesions forming. In shingles, it helps minimize nerve pain and complications. In immunocompromised patients, it provides essential protection against severe viral infections.

What Are Other Benefits

  • Reduces the duration of herpes outbreaks

  • Lowers frequency of recurrent infections with regular use

  • Speeds up healing of skin lesions and blisters

  • Helps reduce viral shedding and transmission risk

  • Provides relief from pain and discomfort during flare-ups


Dosages

Acyclovir is available in different strengths and forms suitable for various infections and patient needs. Always follow your doctor’s prescribed dose for the best results.

Available Strengths or Dosage

Acyclovir comes in several dosage forms, such as:

  • Acyclovir 200 mg, 400 mg, and 800 mg tablets

  • Acyclovir 5% cream or ointment for topical application

  • Acyclovir suspension (oral liquid) for children or those who have trouble swallowing pills

  • Acyclovir injection for severe infections or hospitalized patients

How and When to Take It

Take Acyclovir tablet with or without food, usually every 4–6 hours as directed by your physician. Start the medicine at the first sign of symptoms like tingling, burning, or rash. Drink plenty of water throughout the treatment to protect your kidneys and help your body process the medication efficiently.

For cream or ointment, apply a thin layer to the affected area 5 times daily, unless advised otherwise by your healthcare provider. Wash your hands before and after each application to avoid spreading the virus.

Overdose Caution

Taking more than the prescribed dose can cause side effects such as confusion, agitation, or kidney problems. If you suspect an overdose, seek immediate medical help. Do not double doses to make up for missed ones — simply continue your next scheduled dose as advised.


Who Can Use/T ake Acyclovir

Acyclovir can be used by adults and children as prescribed. It is generally safe for most patients when used under medical supervision.

  • Adults: Used to treat or prevent herpes and shingles.

  • Children: Used for chickenpox and mild viral infections.

  • Elderly patients: May need dose adjustment due to kidney function.

  • Pregnant or breastfeeding women: Should use only after doctor consultation, as the medicine passes into breast milk in small amounts.

People with kidney problems or dehydration should take extra care and follow their doctor’s dosing instructions precisely.


Side Effects & Precautions

What Are the Side Effects

Most people tolerate Acyclovir well, but some may experience mild to moderate side effects.
Common side effects include:

  • Nausea or vomiting

  • Diarrhea

  • Headache

  • Dizziness

  • Fatigue

Rare but serious effects may include:

  • Confusion or tremors

  • Hallucinations (in elderly patients)

  • Kidney pain or reduced urine output

  • Allergic skin reactions like rashes or itching

If you experience severe or persistent symptoms, contact your healthcare provider immediately.

What Are the Precautions to Avoid Side Effects

  • Stay well-hydrated while taking Acyclovir to support kidney function.

  • Avoid alcohol during treatment to prevent dehydration.

  • Do not use the cream or ointment on open wounds or near eyes.

  • Inform your doctor about all other medicines or supplements you’re using.

  • People with existing kidney disease or neurological disorders should take special care.

  • Avoid unprotected contact during herpes outbreaks to prevent spreading the infection.


Always consult your doctor before starting the dose. If prescribed, you can order Acyclovir tablets online safely from trusted pharmacy sources and ensure timely refills to maintain your treatment progress.

Product was successfully added to your cart!