Exposure and Response Prevention (ERP), which falls under the branch of Cognitive Behavioral Therapy (CBT), is clinically proven to be an effective treatment for emetophobia and is widely considered to be the gold standard.
Cognitive Behavioral Therapy (CBT), Acceptance and Commitment Therapy (ACT), and Exposure and Response Prevention Therapy (ERP) have all been proven to be effective for specific phobia treatment including emetophobia. Emetophobia is often special in its treatment compared to other phobias in the need to address safety behaviors and compulsions similar to the treatment of OCD.
As another resource, you can explore the research library we have compiled here at Bia where you will find a collection of the latest research into emetophobia treatment.