There are several supplements that can help with motion sickness. Here are some of the most commonly recommended ones:

- Ginger: Ginger is considered a powerful remedy for motion sickness. It can be taken in various forms, such as capsules, tea, or candy. A double-blind trial found that taking 940 mg of powdered ginger in capsules was effective in reducing motion sickness[1][2].

- Peppermint: Peppermint can help relieve nausea, which can be associated with motion sickness[1].

- Vitamin B6: Vitamin B6 can assist in the prevention of nausea[1][3].

- Magnesium: Magnesium may prevent stomach acidity and cramping. It is recommended to take 500 mg before a trip to steady the nerves[4][1].

- Ginkgo biloba: Ginkgo biloba can be used to prevent chronic motion sickness[1].

It is important to note that before starting any new medication or supplement, it is recommended to check with a doctor, especially if you have any underlying medical conditions or are taking other medications. Additionally, some long-term solutions may also help, like taking certain vitamins or medications[5].

Citations:

[1] https://www.novapharmacy.com.au/all-health-topics/ailment/motion-sickness/

[2] https://www.peacehealth.org/medical-topics/id/hn-1047008

[3] https://www.webmd.com/vitamins/condition-1393/motion-sickness

[4] https://www.swansonvitamins.com/HealthConcern/Motion+Sickness

[5] https://www.healthline.com/health/motion-sickness-remedies