Hi kopia, being sleepy or the feeling of drowsiness is common when first starting an antidepressant. This feeling should go away soon if he has been on it for 3 weeks now. I assume he is taking it in the mornings? According to Mosby's Drug Reference Manual 2006 patients "usually" see improvement by week 4 on Paxil if this is given for Depression.
As for the side effects of stopping the medication suddenly there is a whole long list of items: Headache, nervousness, insomnia, anxiety, tremor, dizziness, fatigue, sedation, agitation, apathy, hallucinations, delusions, psychosis, vasodilatation (which is dilation of the blood vessels and can cause blood pressure problems and irregular heart beats), postural hypotension (extremely low blood pressure upon standing), and palpitations.
I would strong caution him (and anyone) not to stop this medication without physician supervision. Yes, there are a lot of people who do stop their antidepressants on their own but they feel like crap to put it nicely for several weeks until the medication has left their body.
Moderator: Heart & Cardiovascular Disease