Have a prescription for klonopin that is dated 6/20/16. the bottle is mostly full, i use as needed. will the pills still be affective if used in july?

As directed: First, with a prescription that old, you should be sure that the condition for which this was prescribed is still appropriate for treatment with the drug, which should encompass a doctors evaluation. Second, there is an expiration date on the bottle of the drug from the pharmacy; that will articulate whether this is still appropriate for use.