Success rates for achieving 2 or more weeks of EOSA as a function of self‐reported level of baseline methamphetamine use (n = 36, 27, and 15 in the bupropion group, and 35, 18, and 19 in the placebo group for study participants reporting 1–18, 19–29, and 30 days of baseline use, respectively; *P= 0.012 compared with placebo, two‐tailed Fisher's exact test).