Using Suggestion to negate sea sickness?
Currently my party is sailing across a sea to go and slay a dragon that lives on a lonely island. Some of the party members and crew that hadn't sailed before are, naturally, becoming sea sick. One of the players had a great idea to use Suggestion to effectively make some members of the crew temporarily "immune" to sea sickness by suggesting them to simply ignore the imbalance of their equilibrium (which causes sea sickness, as best we understand).
Does this sound like something that can be achieved with Suggestion? It seems to me that it is an involuntary response from the body, not something that you really have control over or can intentionally "ignore".
I'm mostly just curious if it's something you guys would accept or find reasonable? It's mostly for RP purposes so I think, even if it doesn't make sense, why not? Asking for my own understanding really. Thanks!