Always read the ingredients on the label before taking this or any other medication to ensure that there are no elements that may elicit an allergic reaction. Stop taking this medication and consult a doctor if you experience symptoms associated with allergies. Stop using Generic make Butabarbital and seek immediate medical attention if you experience any of the following side effects: drowsiness, lightheadedness, headache, abnormal changes to heart rate, shortness of breath, fever, sore throat, numbness or tingling in the body, weakness or muscle pains, vomiting, loss of appetite, pain in the upper abdomen, upset stomach, nausea, discolored urine or stool, less frequent or lack of urination, diarrhea, lack of coordination. Call your doctor and stop taking this medication if you experience any unusual skin reactions including: jaundice, swelling in the face or tongue, infectious red or purple rash in the face or upper body, burning eyes, skin pain, blistering or peeling of the skin. Note that this is not an all-inclusive list of side effects. Consult a doctor for an extended understanding of the possible risks involved with taking Generic Butabarbital replacement.