Withdrawal symptoms from Pristiq (desvenlafaxine) can vary in duration and severity depending on the individual, their dosage, and the length of time they have been taking the medication. Generally, Pristiq withdrawal symptoms can last for a few weeks to several months after the last dose. Common symptoms may include dizziness, nausea, headache, irritability, anxiety, insomnia, … Continue reading How Long Does Adderall Withdrawal Fatigue Last?