Just a word of caution, when taking medication the first time or taking medication you haven't taken in a long time take do it in the emergency room of a hospital. This month alone I have found out I am allergic to two common medications. One of them just gave me hives and the other I pre-coded.
I had some surgery and was in the recovery room and was given common prescription pain medication and within 10 to 15 minutes I could not breath and had to be given something to flush the whole drug out of my system and put on oxygen. I have been out of the hospital since recovering at home from some surgery I had. I didn't know I was allergic to the medication and had I taken it at home I surely would have died.
PS both drugs I have taken in my life before although not for years. (an antibiotic and the other a prescription pain killer). I have had ZERO allergies in my life until now. My body has just decided at my age it just doesn't like them anymore and was reacting to them (one with hives and the other with asphyxia). I have declined all pain meds since then and have been recovering from a rather painful surgery with just bed rest and over the counter Tylenol at home. I do not look forward to coping with old age afraid to take pain meds but damn if I want to go through that again.