Question: will effexor keep you awake?
Answer: Another class of antidepressants, SNRIs (serotonin norepinephrine reuptake inhibitors), are known to cause sleep problems similar to those in SSRIs, as well as vivid dreams. Common SNRIs are Effexor (venlafaxine), Pristiq (desvenlafaxine) and Cymbalta (duloxetine).