Contraindications
The following contraindications are listed by the manufacturer:
- Hypersensitivity - duloxetine is contraindicated in patients with a known hypersensitivity to duloxetine or any of the inactive ingredients.
- MAOIs - concomitant use in patients taking MAOIs is contraindicated.
- Uncontrolled narrow-angle glaucoma - in clinical trials, Cymbalta use was associated with an increased risk of mydriasis (dilation of the pupil); therefore, its use should be avoided in patients with uncontrolled narrow-angle glaucoma, in which mydriasis can cause sudden worsening.
- CNS acting drugs - given the primary central nervous system (CNS) effects of duloxetine, it should be used with caution when it is taken in combination with or substituted for other centrally acting drugs, including those with a similar mechanism of action.
- Cymbalta and thioridazine should not be co-administered.
In addition, the FDA has reported on life threatening drug interactions that may be possible when co-administered with any CNS stimulant, such as phentermine, diethylpropion, amphetamine, sibutramine, methylphenidate, methamphetamine, and cocaine leading to increased risk for serotonin syndrome.
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