tranylcypromine boosts toxicity of fentanyl transdermal by Other (see comment). Contraindicated. Comment: Stay away from fentanyl in patients who call for concomitant administration MAOIs, or inside of 14 times of halting an MAOI. Intense and unpredictable potentiation by MAO inhibitors has long been described with opioid analgesics.brivaracetam an