fentanyl overdoses by year Options
fentanyl, cyproheptadine. Both raises toxicity of your other by pharmacodynamic synergism. Modify Therapy/Keep an eye on Carefully. Coadministration of fentanyl with anticholinergics could increase risk for urinary retention and/or serious constipation, which may bring on paralytic ileus.iloprost, fentanyl. Possibly increases effects of your other