Etomidate Use Disorder

The goal of this clinical trial is to learn if high-frequency rTMS works to treat etomidate addiction in adults. It will also learn about the safety and tolerability of rTMS. The main questions it aims to answer are: * Does active rTMS reduce craving, amount of etomidate use, frequency of etomidate use, and severity of etomidate use disorder? * Does active rTMS improve cognitive biases related to delayed reward discounting and risk sensitivity? * What side-effects do participants have when receiving rTMS? Researchers will compare active rTMS to sham rTMS to see if active rTMS works to treat etomidate addiction. Participants will: * Receive active rTMS or sham rTMS over 4 weeks * Complete 20 rTMS sessions in total * Visit the clinic for treatment sessions and follow-up assessments * Complete assessments of etomidate use, craving, withdrawal symptoms, mood symptoms, cognition, and decision-making Attend follow-up assessments up to 6 months after baseline