fentanyl, cyproheptadine. Both increases toxicity of your other by pharmacodynamic synergism. Modify Therapy/Check Closely. Coadministration of fentanyl with anticholinergics could enhance risk for urinary retention and/or critical constipation, which may result in paralytic ileus.iloprost, fentanyl. Both will increase effects of your other by phar

Coadministration of pexidartinib (a CYP3A4 inducer) with delicate CYP3A substrates could bring on critical therapeutic failures. If concomitant use is unavoidable, boost the CYP3A substrate dosage in accordance with authorized product labeling.If coadministration of CYP3A4 inhibitors with fentanyl is necessary, monitor patients for respiratory depr