My doctor put me on biaxin 500 mg 2x day for 10 days for oral infection of oral biopsy of floor of mouth. I had been taking simvastatin 20 mg for years. Pharmacist checked with Dr. He said stop simvastatin and take the biaxin. I have only taken 3 biaxin and I have had stomach pains and diarrhea. I woke up at 3.00 am with numbness and tingling in both feet and one hand. I finally dozed off around 6.00 am and woke with stomack pains and when I stood up had cramps in the back of both legs. Should I stop the Biaxin. Thanks, Tom.