I have had a problem with nausea for over 30 years. Fortunately I discovered that a 12mg Chlortrimeton daily keeps it fixed. I am assuming that this is caused by excessive post nasal drip so the antihistimene is apparently the fix. Does anyone else have this problem ? What is your solution? I don't know if I should be concerned with taking this drug over a 35 year or longer period. I tried Claritin and it was like taking candy, no help whatsoever, so I went back to Chlortrimeton.