Why does Celexa 10 mg make you drowsy throughout the day and causes nasal congestion. My doctor recently stopped med. After taking for 3 weeks. How long to expect withdrawal symptoms.

SSRI. It is SSRI which means that it increases serotonin level which has tranquilizing effect so makes you drowsy. Any medicine can cause any symptom. In your case it is causing nasal congestion. Withdrawal sxs if any may not last more than 4 days.