Hypnotherapy is considered as a safe and comlimentary treatment option. It is highly recommended that hypnotherapy is done by a certified therapist. 

Ask your therapist if needed for more information regarding his/her qualifications, experience, and/or any details of hypnotherapy.

Be transparent about any prior physical or mental illness, history of mental illness in the family, medications you might be taking, substnce abuse/addiction. This helps the therapist to decide if hypnotherapy is the right option for you.