PsychRounds: The Psychiatry Podcast [SNRI] - Duloxetine (Cymbalta)
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Jan 19, 2024 Dive into the fascinating world of Duloxetine, an SNRI used to tackle depression, anxiety, and chronic pain. Discover its unique properties compared to other medications and learn about dosing strategies and side effects. Gain insights into its clinical uses, including special considerations for children and patients with liver issues. The discussion also sheds light on the importance of medication adherence and how to effectively manage co-existing conditions.
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Dosing Tips for Duloxetine
- Divide duloxetine dosing to reduce nausea, but dose more in the morning to avoid nighttime activation.
- For example, a 90 mg dose could be split as 60 mg in the morning and 30 mg at night.
CYP2D6 Interaction Risks
- Duloxetine is a strong CYP2D6 inhibitor and substrate, causing drug interactions raising plasma levels.
- This can lead to increased side effects or dangerous outcomes with other CYP2D6-metabolized drugs like amitriptyline.
QTc Prolongation Anecdote
- A patient on duloxetine and low-dose amitriptyline developed dangerously prolonged QTc and anticholinergic symptoms.
- Stopping both medications normalized QTc and resolved symptoms, showing a serious interaction case.
