According to the official Effexor XR website, common
side effects may include nausea, dizziness, sleepiness,
sweating, dry mouth, gas, abnormal vision, nervousness, insomnia, loss of appetite, constipation, confusion, agitation, tremors, yawning, palpitations, and increased cholesterol.
Since both come from the same family of SSRI's, it's difficult to determine if Effexor XR would be a better medication for you.