Phenytoin [posted 8/14/98]
Question: I am interested in the use of Phenytoin for the prevention of motion sickness. Several sources have mention this drug as being an excellent preventative, but my pharmacist has cautioned me against its use without supplying good reasons except that it may be habit forming. Could you supply further information?

Answer: Phenytoin is sold under the brand name Dilantin. This is a drug initially used for seizures. I have no experience with it as a medication for motion sickness, but given the dearth of alternatives, would not be opposed. Dilantin takes several days to achieve steady state levels due to its long 1/2 life. I'm not sure the dosage and the timing before the motion event that would work. However, it is usually well tolerated - not addicting. There are patients with allergic reactions and the blood level would have to be watched closely as it is a potentially toxic drug. Let me know if you find further information.

Phenytoin
Question: A 35 year old man had been operated on for haemorrhaegic brain stroke six months ago. He is now taking 0.5 mg Klonazepam twice a day and 100 mg Phenytoin twice a day. He started the medication after the operation. He suffers from dysarthria, which appeared five days after the operation. Could the dysarthria that still exists is due to phenytoin?

Answer: Assuming his dilantin levels are normal, I suspect it is his stroke. Stopping his drugs for a day or so may help differentiate between drug effects and his stroke. First, clear this with his doctor.

Back to Drug InfoNet Home Page.