What class of drugs is usually indicated for nausea and vomiting during pregnancy?

Antiemetics are specifically designed to prevent and treat nausea and vomiting. During pregnancy, many individuals experience nausea and vomiting, often referred to as "morning sickness." Antiemetics work by targeting the pathways in the brain and gastrointestinal tract that trigger the vomiting reflex.

While antihistamines can also be used to alleviate nausea in some cases, their primary function is to block histamine receptors and are not classified solely as antiemetics. Antibiotics are designed to treat bacterial infections and have no role in managing the symptoms of nausea or vomiting. Analgesics are pain-relieving medications that do not address nausea at all.

Therefore, antiemetics are the appropriate class of drugs when dealing with nausea and vomiting in pregnant individuals, making them the correct choice in this scenario.