sinusitis
"Got Amoxicillin for tooth pain and root canal infection. Staying in the north of Namibia and had to get the swelling and pain off before going to Europe to treat the tooth at a better dentist . The prescription was 3 x day for 5 days . In 2012 I used it also for a week for Acne treatment . BOTH TIMES I got terrible headache meningtitis type feeling from day two on which lingered on for some days after I finished the drug. The first time I was not sure what to make out this rare symptoms and the doctor was in doubt as I don't remember an allergy on anitibiotics.  But now in 2015 taking the same drug its the same side effects. So I guess Amoxicillin can have this bad effects I finished the course both times but the side effects were identical...."