Toprol-XL and severe stomach pain

Started taking the generic Toprol XL (metoprolol succinate) 50 mg/day 11 days ago. I had been having vague gastric problems prior to taking it but two days after I started, I began having severe stomach pain that would double me over with diarrhea so severe it felt like my guts were turning inside out. I got a presciption from a doctor I work with for Lomotil which is a fairly heavy duty smooth muscle relaxor for the gut. As the week went on, I was taking these pills every 2-3 hours to keep the pain at bay. I was starting to pass some blood because this was so severe.

I've made an appointment with a GI doctor to have this checked out (couldn't get an appointment for 2 more weeks) and said to my boyfriend I wish I knew what was going on. He pointed out that this started right after I started taking the BP med. I skipped my pill yesterday and today....guess what? I am pain free today for the first time in a week.

I NEVER would have associated this kind of horrible pain with a blood pressure medication. It did bring my pressure down very nicely...in fact it's a bit too low now. Back to the internist next week to try something else out.