Using butalbital together with divalproex sodium may increase unwanted effects such as dizziness, drowsiness, confusion, and difficulty concentrating. Some people, especially the elderly, can also experience impairment in thinking, judgment, and motor coordination. You should avoid or limit using alcohol while receiving care using these medications. Also avoid activities requiring mental alertness for example driving or operating hazardous machinery and soon you know how the medications affect you. Talk to your physician when you have questions or concerns. It is important to educate doctor about all the medications you use, including vitamins and herbs. Do not stop using any medications without first actually talking to your doctor.