Your doctor may start with medications such as cyclizine, promethazine or prochlorperazine. If these are not controlling your symptoms, you can try a medication called ondansetron, which is effective for a lot of women. If you have severe HG and none of the medications are working, even when combined, then they may try you on steroids. Additionally, if you are becoming dehydrated, you may have to go to hospital for a drip.
All of the medications used have been around for many years and have never been found to cause harm to the baby. Recent evidence shows that not treating HG effectively with medication may increase risks to the baby and certainly causes significant suffering for mum.
Some of the medications can cause side effects for mum, though, such as drowsiness and – with ondansetron in particular – constipation. You may find that it’s a balance between managing symptoms and side effects.
Hyperemsis Ireland have lots of resources which can offer much more information about medications and treatments for HG.