 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  dextromethorphan, methyldopa, metoclopramide, tetrabenazine, valbenazine, certain opioid medications (such as meperidine, methadone, tapentadol), certain supplements (such as tryptophan, tyramine), certain "triptans" used to treat migraine headaches (such as rizatriptan, sumatriptan), certain drugs for Parkinson's disease (entacapone, levodopa, tolcapone). The risk of serotonin syndrome/toxicity increases if you are also taking other drugs that increase serotonin. Examples include street drugs such as MDMA/ "ecstasy," St. John's wort, certain antidepressants (including maprotiline, mirtazapine, SSRIs such as fluoxetine/paroxetine, SNRIs such as duloxetine/venlafaxine, tricyclics such as amitriptyline/doxepin), among others. The risk of serotonin syndrome/toxicity may be more likely when you start or increase the dose of these drugs. Some products can interact with procarbazine if you take them together, or even if you take them </s>