Aciclovir (Acyclovir) – Side Effects

Aciclovir (Acyclovir) is an oral antiviral drug used to treat genital herpes; does not cure the disease but relieves the symptoms. This can cause impaired functioning and may pose a safety issue, especially when driving a car, operating machinery or running heavy equipment. Acyclovir comes in several different formulations, and can be given orally or applied topically.

Aciclovir (Acyclovir) is used to decrease pain and speed the healing of sores or blisters in people who have varicella (chickenpox), herpes zoster (shingles; a rash that can occur in people who have had chickenpox in the past), and first-time or repeat outbreaks of genital herpes (a herpes virus infection that causes sores to form around the genitals and rectum from time to time).

The medicine is also sometimes used to prevent outbreaks of genital herpes in people who are infected with the virus. Aciclovir (Acyclovir) is in a class of antiviral medications called synthetic nucleoside analogues. It works by stopping the spread of the herpes virus in the body. Aciclovir will not cure genital herpes and may not stop the spread of genital herpes to other people.

Aciclovir (Acyclovir) may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:

  • Upset stomach
  • Vomiting
  • Diarrhea
  • Dizziness
  • Tiredness
  • Agitation
  • Pain, especially in the joints
  • Hair loss
  • Changes in vision

Some side effects can be serious. If you experience any of the following symptoms, call your doctor immediately:

  • Hives
  • Rash or blisters
  • Itching
  • Difficulty breathing or swallowing
  • Swelling of the face, throat, tongue, lips, eyes, hands, feet, ankles, or lower legs
  • Hoarseness
  • Fast heartbeat
  • Weakness
  • Pale skin
  • Difficulty sleeping
  • Fever, sore throat, chills, cough, and other signs of infection
  • Unusual bruising or bleeding
  • Blood in the urine
  • Stomach pain or cramps
  • Bloody diarrhea
  • Decreased urination
  • Headache
  • Hallucinations (seeing things or hearing voices that do not exist)
  • Confusion
  • Aggressive behavior
  • Difficulty speaking
  • Numbness, burning, or tingling in the arms or legs
  • Temporary inability to move parts of your body
  • Shaking of a part of your body that you cannot control
  • Loss of consciousness

The medicine should be taken in the right quantity as prescribed by the doctors or health care professionals. Excessive intake or higher dose may lead to severe health issues like:

  • Agitation
  • Seizures
  • Extreme tiredness
  • Loss of consciousness
  • Swelling of the hands, feet, ankles, or lower legs
  • Decreased urination