This suggested study will test a potent antiemetic drug used in other clinical situations such as antineoplastic treatment. Granisetron is a potential antagonist for the 5-hydroxytryptamine3-receptor - 5HT(3), The drug binds to the receptor and blocks the effect of nausea and vomiting. Kytril mechanism of action was successfully proven for various medical situations as a potential antiemetic agent. Our Center for dental sedation and anesthesia in the oral medicine department have received approval to use Granisetron as an antigagging drug in dental situations based on several pilot studies conducted in other medical centers in different clinical situations such as strabismus corrections, post hysterectomy and others. Our preliminary clinical impression is that pre-emptive IV administration of this drug to patients with increased gag reflex is beneficial.