This Is For My Husband. Has Had Paid Off And

This is for my husband. Has had paid off and on for several week, located mainly in lower back and lower abdomen, both sides, but now mainly left abdomen. He takes 120 mg diltazem daily. Have read that there could be some side effects of body aching. He has been taking one tylenol and one ibruprofen about every four hour to manges pain, but still very uncomfortable. Advise?