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Composition for HERPEX

Acyclovir(100 mg)

food interaction for HERPEX

alcohol interaction for HERPEX

pregnancy interaction for HERPEX

lactation interaction for HERPEX

It can be taken with or without food, but it is better to take Herpex 100mg tablet at a fixed time.
It is generally safe to consume alcohol with Herpex 100mg tablet.
Herpex 100mg tablet is probably safe to use during pregnancy.
Either animal studies have shown no adverse effect on the fetus, but there is no human studies or animal studies have shown an adverse effect that was not confirmed in human studies. Please consult your doctor.
Unknown. Human and animal studies are not available. Please consult your doctor.


Acyclovir(100 mg)


Herpex 100mg tablet is used to viral infections of skin, mucus membrane and genitals caused by herpes simplex virus including shingles. It is also used for treating recurrent herpes simplex infections and to prevent herpes simplex infections in people prone to infections due to a weak immune system (immunocompromised). Herpex 100mg tablet can also be used to treat chickenpox (also viral infections).

How it works

Herpex 100mg tablet is an antiviral drug and belongs to class called synthetic nucleoside analogues. It works by blocking the process by which the virus grows and multiplies. Herpex 100mg tablet thus stops the virus from spreading in the body.

Common side effects

Vomiting, Nausea, Neurological disturbances, Abdominal pain, Acute renal failure, Confusion, Hallucination, Diarrhoea, Dizziness, Drowsiness, Fatigue, Headache, Hepatitis (viral infection of liver), Jaundice, Skin rash


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Expert advice for HERPEX

Drink plenty of fluids and stay hydrated while taking acyclovir.
If  you have genital herpes it can spread through sexual contact even if you don't have blisters or other symptoms and possibly even if you are taking acyclovir. Take your doctor's advice on necessary precautions 
  • Do not drive or operate machines if you feel drowsy after taking acyclovir
  • Do consult your doctor before taking acyclovir if you are pregnant or planning to become pregnant
  • Do consult your doctor before taking acyclovir if you are breast-feeding
  • Take acyclovir as directed by your doctor during pregnancy to prevent genital herpes blisters. The infection may be passed on to the baby during childbirth if you develop genital blisters.
Do consult your doctor before taking acyclovir if you have,
  • Kidney problems 
  • Elderly
  • Weak immune system (immunocompromised)
  • Breathing difficulties
  • Nervous disorder
  • Abnormal levels of salts (electrolytes) in blood

Frequently asked questions for HERPEX


 Q.Is dydrogesterone same as progesterone?
No. Dydrogesterone is an artificially synthesized drug which is very similar to the naturally produced female hormone progesterone. Its action in the body is closely related to progesterone.
Q.Is dydrogesterone safe?
Yes. Dydrogesterone is safe if used at the prescribed does for the prescribed duration as advised by your doctor.
Q.Is dydrogesterone banned in USA?
No dydrogesterone is not banned by the US FDA (US- Food and Drug Administration).
Q.Is dydrogesterone a steroid?
Yes. Dydrogesterone has steroidal chemical structure which is very similar to the naturally produced steroidal female hormone progesterone.
Q.Dydrogesterone is used for?
Dydrogesterone is used to treat conditions associated with low levels of female hormone progesterone. It may also be used in combination with estrogen drugs as a hormone replacement therapy in females at menopause (the time in a woman’s life when her menstrual periods stop).
Q.Does dydrogesterone delay periods?
Yes. Delayed, irregular, painful and heavy menstrual periods are among the common side effects of dydrogesterone.
Q.How does dydrogesterone work?
Dydrogesterone works by replacing female hormone progesterone in conditions where the body fails to produce sufficient amounts.


Content on this page was last updated on 28 October, 2015, by Dr. Varun Gupta (MD Pharmacology)