Effexor has fewer side effects than many of the SSRI-type of antidepressants, such as Prozac, Zoloft, Celexa and Paxil. For instance, Effexor is much less likely to cause weight gain or a feeling of being jittery. As with any medication, side effects are possible and can include:

• Nausea
• Feeling dizzy
• Being drowsy
• Early ejaculation
• Sweating
• Dry mouth
• Gas
• Vision problems
• Nervousness
• Sleeping problems
• Anorexia
• Constipation
• Confusion or agitation
• Tremor
• Yawning
• Palpitations