When diving in Florida, the best places are along the Florida Keys. Trouble is, even in rather mild winds, the ocean swell can be daunting due to the shallow waters. This can mean a pretty unpleasant boat trip to the dive site. It's somewhat effective. I've used it.
Trouble is, it's side-effective too.
Dramamine can cause hallucinations and convulsions according to the literature and it makes you drowsy besides. Fortunately, there is an alternative. Fresh ginger root has been found to be more effective than Dramamine in preventing motion sickness. And the only side effects it has are good ones. It freshens your breath.