There are many different types of medicines for nausea. The one you receive in a hospital depends on what may be causing your queasiness, your doctor’s preferred treatment protocol, and other variables. Some of the general classifications for anti-nausea medication include: Serotonin antagonists NK-1 receptor antagonists Steroids Dopamine antagonists Cannabinoids Benzodiazepines Some anti-nausea medications can be used on their own or in combination with other types of these drugs.