In the real world, the practice of hypnotherapy is not as scary, simple, or powerful as its pop culture depictions. Hypnosis by a trained therapist is a safe alternative or supplement to medication. It is not a form of mind control—which is impossible to achieve. Clients remain completely awake throughout hypnotherapy sessions and should be able to fully recall their experiences. They also fully retain free will. If a therapist’s “post-hypnotic suggestion” is effective, it’s because they are suggesting something the client wants to achieve and, in their relaxed state, that individual is better able to envision and commit to a suggested positive path to change.
Negative side effects are rare but can include headaches, dizziness, drowsiness, and feelings of anxiety or distress. In rare cases, hypnotherapy could lead to the unconscious construction of “false memories,” also known as confabulations.