I was given this for acne and about one week into it I started having body aches. I read that it is a side effect so I thought I'd just Motrin it up. I was not sleeping, but I thought it was because of my body aches so I took some Tylenol pm for a couple nights. I ended up with itchy hives because I'm allergic to benadryl and I did not know that Tylenol pm contained benadryl. So my doctor told me it was the allergic reaction to the benadryl and to keep taking the sulfameth. I feel worse today and I will not take another sulfer pill. Everything on my body hurts! I'm shakey and disoriented. Tomorrow is thanksgiving, my husband is away in the service, and it's up to me to make it a great holiday for my kids. I will NOT be taking this medication (or Tylenol pm) again.