<unk>  should not be taken with monoamine oxidase inhibitors due to the potential for serotonin syndrome, which is a potentially life-threatening condition that can occur rapidly, due to a buildup of an excessive amount of serotonin in the body. Patients who are taking<unk>  should exercise caution when drinking grapefruit juice or eating grapefruit, as compounds in grapefruit affect a number of drugs, including<unk> , through the inhibition of the cytochrome P450 system in the liver, and can lead to excessive accumulation of the drug which both increases and prolongs effects. Grapefruit and grapefruit juices (especially white grapefruit juice, but also including other citrus fruits such as bergamot and lime, as well as a number of noncitrus fruits) generally are recommended to be avoided while using<unk>  and numerous other medications.
Dextromethorphan
Nalorphine
Pethidine
Dextrorphan
Aceclidine
Betamethadol
Fentanyl
Procaine