Common pills that can cause overdose include: - Synthetic opioids (Oxycodone, Fentanyl, Carfentanil, and other analogs) - Opioids (Morphine, Heroin) - Antidepressants (Prozac, Zoloft, Cymbalta, Wellbutrin) - Benzodiazepines (Xanax, Valium, Klonopin)