May I know the reason why you want to take them together.
We do prescribe multivitamins, calcium, fish oil along with antidepressants like Duloxetine (Cymbalta) in some patients if needed so I don't think there is much harm in taking them together but please note that your doctor should be aware of your taking all of them together. Your doctor can prescribe you the adequate dose of each of them depending on your daily requirement.
are you there Bella ?
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Thanks for your reply Bella. In my view, there is no harm in trying 60 mg as a single dose at night if your doctor agrees to it. In those patients who are taking 120 mg per day, we usually divide the dose as 60 mg twice a day and most of them are able to tolerate it.
If you are still not able to sleep at night, then you can discuss with your doctor about adding a low dose of Mirtazapine 7.5 mg to be taken at night. Mirtazapine is a very sedating antidepressant so it will not only help in sleeping at night but will also augment the action of Cymbalta.