Hi, my husband has been dizzy and light headed since last night! At one point the room was spinning! This morning he noticed his pupils were very tiny! I'm wonder if his symptomss were a drug interaction? Currently he is taking : 75mg of clpopidogrel once a day, I tablet twice daily of metoprolol 25mg, and 1 tablet once a day of rosuvastatin....and for his epilepsy he takes : 500mg 4x per day of zarontin, 30mg of phenobarbital 2x per day, 100mg carbamazepine 4x per day, and100mg Dilantin 4x per day!