Hello doc, can I take b vitamins and magnesium citrate supplement while taking effexor (venlafaxine)?

Yes . I believe it is a good idea to take b vitamins and magnesium with effexor (venlafaxine). You should also consider vit d3 5000 iu- which everyone should take in fall and winter months but which should be taken year-round if you use sunscreen or don't get mid-day sun in spring and summer months. And i advise everyone to take at least 1000 mg of vit. C twice a day.