1 doctor weighed in:

Is it okay to take expired valtrex (valacyclovir)? Can it be poisonous or toxic? Can it be less effective?

1 doctor weighed in
Dr. Thomas Namey
Internal Medicine - Rheumatology

In brief: When did it expire?

* years. Wouldn't take it.
One year..I would. Was it in a bottle in a shelf, or sitting out exposed to light. Wouldn't take it sitting out for some time. Most medicines not requiring refrigeration after opening the bottle have a two year "safe" time, assuming no high heat or water!

In brief: When did it expire?

* years. Wouldn't take it.
One year..I would. Was it in a bottle in a shelf, or sitting out exposed to light. Wouldn't take it sitting out for some time. Most medicines not requiring refrigeration after opening the bottle have a two year "safe" time, assuming no high heat or water!
Thank