What medicine interact with phentermine?

Avoid taking MAO inhibitors (isocarboxazid, linezolid, methylene blue, moclobemide, phenelzine, procarbazine, rasagiline, safinamide, selegiline, tranylcypromine) during treatment with this medication. Most MAO inhibitors should also not be taken for two weeks before treatment with this medicationguanethidine, methyldopaphenothiazines (such as prochlorperazine, chlorpromazine),other stimulants (including amphetamines, methylphenidate, street drugs such as cocaine or MDMA/"ecstasy").