Deutetrabenazine and Tetrabenazine interaction
Deutetrabenazine and Tetrabenazine: both prescribing labels flag this combination with the strongest language, such as a contraindication, a boxed warning, or an instruction to avoid it.
Do not combine without a prescriber's guidance. The label language below is the strongest FDA uses.
What the FDA labels say
From the Deutetrabenazine (Austedo) label · effective 2025-02-28
Taking tetrabenazine or valbenazine [see Drug Interactions ( 7.6 )] .
Taking reserpine, MAOIs, tetrabenazine, or valbenazine ( 4 , 7.2 , 7.3 , 7.6 )
Concomitant Tetrabenazine or Valbenazine AUSTEDO XR and AUSTEDO are contraindicated in patients currently taking tetrabenazine or valbenazine.
Following administration of 25 mg of tetrabenazine to healthy volunteers, peak plasma prolactin levels increased 4- to 5-fold.
Chronic increase in serum prolactin levels (although not evaluated in the AUSTEDO XR, AUSTEDO, or tetrabenazine development programs) has been associated with low levels of estrogen and increased risk of osteoporosis.
From the Tetrabenazine label · effective 2019-11-29
• Taking deutetrabenazine or valbenazine [see Drug Interactions ( 7.7 )] .
• Taking deutetrabenazine or valbenazine ( 4 , 7.7 )
Concomitant Deutetrabenazine or Valbenazine Tetrabenazine tablets are contraindicated in patients currently taking deutetrabenazine or valbenazine.
Certain conditions may increase the risk for torsade de pointes or sudden death such as (1) bradycardia; (2) hypokalemia or hypomagnesemia; (3) concomitant use of other drugs that prolong the QTc interval; and (4) presence of congenital prolongation of the QT interval [see Warnings and Precautions ( 5.8 ), Clinical Pharmacology (12.2) ].
…are known to prolong QTc, including antipsychotic medications (e.g., chlorpromazine, haloperidol, thioridazine, ziprasidone), antibiotics (e.g., moxifloxacin), Class 1A (e.g., quinidine, procainamide) and Class III (e.g., amiodarone, sotalol) antiarrhythmic medications or any other medications known to prolong the QTc interval [see Drug Interactions ( 7.5 )].
Taking more than these two? Interactions stack. Check your whole list at once; it stays in your browser.
Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.