In addition to some antihistamines, doctors use other anti-nausea drugs such as prochlorperazine.
From the telegraph.co.uk
They can be suppressed by medicines such as prochlorperazine tablets, or similar, though these are not without side-effects and can cause drowsiness.
From the dailymail.co.uk
She found that clinical trials involving 200,000 women comparing various drugs, including the antihistamines promethazine and prochlorperazine, with placebos confirmed their safety and efficacy.
From the telegraph.co.uk
More examples
Antipsychotic and antiemetic drug used to treat schizophrenia and to combat nausea and vomiting
Prochlorperazine (Compazine, Stemzine, Buccastem, Stemetil, Phenotil) is a drug that belongs to the phenothiazine class of antipsychotic agents that are used for the antiemetic treatment of nausea and vertigo. It is also a highly-potent typical antipsychotic, 10-20x more potent than chlorpromazine.
Concurrent treatment with Desferal and prochlorperazine, a phenothiazine derivative, may lead to temporary impairment of consciousness.