I copied this information for you. I hope this helps.
"What other drugs will affect methadone"?
Do not use methadone with other narcotic pain medications, sedatives, tranquilizers, muscle relaxers, or other medicines that can make you sleepy or slow your breathing. Dangerous side effects may result. Do not use methadone with any of the following drugs without first talking to your doctor:
a diuretic (water pill);
antibiotics such as azithromycin (Zithromax), ciprofloxacin (Cipro), clarithromycin (Biaxin), erythromycin (E-Mycin, Ery-Tab), itraconazole (Sporanox), ketoconazole (Nizoral), metronidazole (Flagyl) or voriconazole (Vfend);
heart or blood pressure medication such as diltiazem (Cardizem, Dilacor, Tiazac) or verapamil (Calan, Covera, Isoptin, Verelan);
HIV medicines such as abacavir (Ziagen), amprenavir (Agenerase), didanosine (Videx), efavirenz (Sustiva), lopinavir/ritonavir (Kaletra), nelfinavir (Viracept), nevirapine (Viramune), ritonavir (Norvir), stavudine (Zerit), or zidovudine (Retrovir);
an MAO inhibitor such as isocarboxazid (Marplan), tranylcypromine (Parnate), phenelzine (Nardil), or selegiline (Eldepryl, Emsam);
other narcotic medications such as pentazocine (Talwin), nalbuphine (Nubain), buprenorphine (Subutex), or butorphanol (Stadol);
rifampin (Rifadin, Rimactane, Rifater); or
seizure medication such as phenobarbital (Luminal, Solfoton) or phenytoin (Dilantin).
Good luck to you and best wishes,
- Methadone Information for Consumers
- Methadone Information for Healthcare Professionals (includes dosage details)
- Side Effects of Methadone (detailed)
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