Immediately consult your physician, if Cafergot administration shows any of the following side effects: Sudden numbness or weakness of one side of the body, Sudden headache, confusion, Problems with vision, speech or balance, Fast or slow heart rate, Muscle pain in arms or legs, Leg weakness, Severe pain in stomach or lower back, Less urination or total stoppage of urine, Swelling or itching of any body part, Numbness or tingling with a blue-colored appearance in fingers or toes, High blood pressure