My doctor has given me a medicine called pristiq (desvenlafaxine) for my anxiety but didn't tell me anything about it what are the side effects will it help?

Pristiq (desvenlafaxine) Pristiq (desvenlafaxine) is an antidepressant that increases serotonin and nor epinephrin similar to Effexor and cymbalta common side effects are nausea vomiting diarrhea, sexual side effects and high blood pressure there can be withdrawal if you suddenly stop it.
Anxiety is not. currently an FDA indication for Pristiq (desvenlafaxine). It is being used off-label (which is fine). Potential side effects w Pristiq (desvenlafaxien) can include insomnia, unusual dreams, nausea, vomiting, constipation, drop in appetite, dizziness, vertigo, ringing in ears, erectile dysfunction, fatigue, headache, drowsiness, anxiety, tremor, ^’ed sweating, chills, yawning, blurred vision, dry.