Meclizine and Vitamin B6 are often used together to help alleviate nausea and vomiting caused by motion sickness or vertigo. Meclizine is an antihistamine that works by blocking certain chemicals in the brain that cause nausea and vomiting. Vitamin B6 is a nutrient that can also help reduce nausea and vomiting. Together, Meclizine and Vitamin B6 can help provide relief for individuals experiencing motion sickness or vertigo symptoms.