After sleep during the day i feel dizzy next, but consuming sweet stuff makes me feel better, only day sleep makes me bad.efexor sr 150 per day.regards

Effexor (venlafaxine): Effexor (venlafaxine) can cause high blood pressure which can cause dizziness. Maybe you could have hypoglycemia and so eating sweets may be affecting you etc. Need more details.

? Low blood sugar: It sounds like you might be having low blood sugar episodes. Try eating multiple small meals a day. This will usually help. For a definitive diagnosis your doctor needs to run a glucose tolerance test. Talk to him about this.Let me know how this turns out. Take care.