There are medicines available to you. Ask your physician or pharmacist. Chinese sailors used to chew on ginger root. Clinical studies have shown that ginger is a successful solution. It can be as effective as medicine but has less side-effects if any at all.
Some people believe in wearing wrist bands.
If you believe in it, do it. Faith will help in many cases where other remedies will fail. The wristband has proven to be practical for wiping away the spittle around the mouth. You can sit and chat with the retired seamen at the harbor. Especially when you care about them.