" Acyclovir is an  active agent in VIRA eye ointment, is a guanosin  analog  anti-viral drug used in the treatment of viral infection caused by Herpes simplex and Herpes zoster virus.

As per literary data Acyclovir is non carcinogenic. Acyclovir is non toxic for mammalian cells but in virus it gives toxic effect. Acyclovir may called as prodrug because  in  infected cell acyclovir  is phosphorylated  from monophosphate to triphosphate by cellular enzyme of infected cell which is an active agent against virus. Acyclovir  triphosphate  inhibits the virons by acts on viral DNA and inhibits the synthesis of viral DNA which stops the multiplication of virus.  Uninfected cells does not give any response against acyclovir."

"Vira  is indicated to used in following-

• viral infection in eye susceptible to H. simplex and H. zoster.

"

"Before using VIRA tell your doctor about medical history and all kind of allergies. It is for more precautionary purpose.

ADVERSE EFFECT-

• dry, cracked, or peeling lips;
• dryness or flaking of treated skin;
• burning, stinging, or itching when the medicine is applied.

"