Hi Saralee, I see several important issues in your question.  First is the fact that your partner is asking you to get him medication from your doctor. That makes me wonder why he will not go to a doctor himself.  Is he asking you to lie and say the meds. are for yourself?  Just about no Physician anywhere will prescribe medication for a patient they have not examined, that is not legal or ethical. My second thought was I wonder if he's trying to tell you something by asking you to get this specific medication for him.  I assume he knows you could google the name or ask someone on the internet (like you just did) and find out what it is and what it is for. Maybe he wants to know where you stand but is afraid to come right out and ask. Thirdly, is he  right...will you leave him if he has an STD like herpes or something else? If he does have herpes, for example, you need to know all the facts about it so you can make an informed decision about whether you can live with someone who has it. The same would be true for any other STD.   Finally, you can read about Acyclovir on this site!   Best Wishes, Dr. Jennifer Fee The Stress Masters   *Dr. Fee is a Psychologist, not a Psychiatrist. Psychiatrists prescribe medications, Psychologists study them, but the majority of Psychologists are not authorized to prescribe meds. or give you specific advice about them. Dr. Fee's answers are not intended to diagnose or treat any medical or mental disorder. Any information given in a post about medication is for educational purposes only, and primarily to aid you in having an informed discussion with your own Psychiatrist/Physician.