What drugs interact with sertraline and venlafaxine?
All SSRIs, including sertraline, should not be taken with any of the monoamine oxidase inhibitor (MAOI) class of antidepressants, for example
- isocarboxazid (Marplan),
- phenelzine (Nardil),
- tranylcypromine (Parnate),
- selegiline (Eldepryl, Emsam, Elazar), and
- procarbazine (Matulane).
Other drugs that inhibit monoamine oxidase include
Such combinations may lead to confusion, high blood pressure, tremor, hyperactivity, coma, and death. (A period of 14 days without treatment should lapse when switching between sertraline and MAOIs.) Similar reactions occur when sertraline is combined with other drugs — for example, tryptophan, St. John’s wort, meperidine (Demerol, Meperitab), tramadol (ConZip, Synapryn FusePaq, Ultram) — that increase serotonin in the brain.
Cimetidine (Cimetidine Acid Reducer, Tagamet HB ) may increase the levels in blood of sertraline by reducing the elimination of sertraline by the liver. Increased levels of sertraline may lead to more side effects.
Sertraline increases the blood level of pimozide (Orap) by 40%. High levels of pimozide can affect electrical conduction in the heart and lead to sudden death. Therefore, patients should not receive treatment with both pimozide and sertraline.
Venlafaxine should not be used in combination with a monoamine oxidase inhibitor (MAOI) such as phenelzine (Nardil), tranylcypromine (Parnate), isocarboxazid (Marplan), and selegiline (Eldepryl), or within 14 days of discontinuing the MAOI. At least 5 days should be allowed after stopping venlafaxine before starting an MAOI. Combinations of SNRIs and MAOIs may lead to serious, sometimes fatal, reactions including very high body temperature, muscle rigidity, rapid fluctuations of heart rate and blood pressure, extreme agitation progressing to delirium, and coma. Similar reactions may occur if venlafaxine is combined with antipsychotics, tricyclic antidepressants or other drugs that affect serotonin in the brain. Examples include tryptophan, sumatriptan (Imitrex), lithium, linezolid (Zyvox), tramadol (Ultram), and St. John’s wort.
Combining venlafaxine with aspirin, nonsteroidal anti-inflammatory drugs (NSAIDs), warfarin (Coumadin), or other drugs that are associated with bleeding may increase the risk of bleeding, because venlafaxine is associated with bleeding.
Most medications affecting the brain such as venlafaxine have the potential to slow reflexes or impair judgment. Therefore, caution is advised especially early in the course of treatment.
Safety has not been established in children below the age of 18 years.