I am always concerned when I see a thread recommending use of medications and cures in general, but much more so, when it involves flying or piloting a plane.
In prescribing a medication (which is what you are doing when you suggest someone use it for a set purpose) you need to take into account the persons age, sex, underlying medical conditions, and the effects it may have on any other medications they are taking.
Bear in mind when you tell someone that ?I take drug XYZ for that problem and it works wonders? your listener considers you, as a user, somewhat of an expert.
Pretty much all medications that have a beneficial effect on motion sickness and vertigo have a similar side effect profile.
Many have dire consequences for those with mild to severe heart disease, pregnant or about to be pregnant women, elderly, folks with urinary or gastrointestinal tract problems. Not everyone who has heart disease know they have it and use of these medications may cause the first symptom which is occasionally sudden cardiac death. Not all women early in a pregnancy know they are pregnant.
All of them will also have some mild to severe negative impact on multiple commonly prescribed medications.
Of all those listed above Cinnarizine is the most worrisome as it can on occasion cause Parkinson syndrome, often years after its use.
Most all will cause some degree of difficuly urinating especially in men over 40.
Most all will cause some degree of short term mental confusion, dry mouth, rapid heart rate, and decreased reflexes as well as occasional severe mood swings.
Most side effects, as well as benefits, are dose dependent. Not enough it will not work. Too much and side effect occur and worsen.
Zofran has a significant effect on the hearts electrical activity and can, given, age other meds and underlying disease cause cardiac arrest.
Almost all can cause rapid heart rate often life threatening.
In almost 30 years of practice I have seen several heart attacks and strokes caused by someone taking a medication recommended by a friend or acquaintance.
Keep in mind if you give someone your ?prescription? anti whatever med and they drop dead as a result you are responsible.
Of the above mentioned remedies the only ones I suspect present no danger are chocolate, and the wrist bands. The chocolate probably works due to the caffeine in it.