Hi, yes Topomax has some side effects. You start on 25 mg and then weekly increase to the dose your doctor wants you to be on. I was at 75 mg before I started experiencing parasthesia (tingling) and frequent urination. The drug dehydrates you and by doing so removes Potassium from your body's supply. I was on it for two months before I switched neurologists and he told me this. By month 4 I had suffered three urinary tract infections and so I went off it. Additionally I had developed an asthma-like wheeze which lingered for three months after I was weaned from it. I wouldn't drink alcohol with this medicine, it causes what we call brain fog and so many people jokingly call it Dopomax.
This is just my experience. Many others I know tolerate it fine. I have complex migraine and Arnold Chiari Malformation. Headaches are a big part of my disease.