Astronauts use them too: which remedies really help against motion sickness?

Motion sickness can ruin any trip. According to HLN, a professor discusses eight remedies that can help, some of which are even used by astronauts.
The expert covers both home remedies and medications. Which remedies are discussed and whether they work is not known. The article assumes that there are effective options.
Motion sickness is a common problem, especially on long trips. It is not clear whether the mentioned remedies really work or how astronauts use them. HLN only reports that the professor examines the remedies.
This report is a summary based on the mentioned source and is not medical advice. Consult a doctor or pharmacist in case of complaints.