hi there i take it from the question that you face migraine and seizures i also take it you are taking buspar or buspirone and i understand you are having dry mouth with throat pain. first and foremost it seems to me that your throat pain and dryness of mouth they may both be happening due to a urti ie upper respiratory tract infection from the limited data mentioned there is a high probability that you have a cold and you are breathing through mouth- explains the dry mouth associated pharyngitis can cause throat pain. why are you on buspirone it is an anti anxiety medicine it is not meant for seizures unless of course it was started for anxiety induced headaches that would be tension headaches, not migraine BuSpar is used to treat symptoms of anxiety, such as fear, tension, irritability, dizziness, pounding heartbeat, and other physical symptoms. buspar has a long list of side effects i will list some of them below but i should add pharyngitis is a side effect of buspar Dizziness or lightheadedness especially when getting up from a sitting or lying position suddenly drowsiness (severe) loss of consciousness nausea or vomiting stomach upset very small pupils of the eyes hope i have been able to help you best of luck