With each wean of sertraline, how long does it take for blood levels to level? days?

Most people tolerate: a reduction of 50% of dose followed in 3 days by another 50% reduction for 3 days, then discontinuation. Some require slower reduction. Withdrawal effects include dizziness, stomach cramps, nausea, tingling, sweating. If they occur, raise dose a little and then withdraw more slowly. Discuss with your prescriber and watch for return of original target symptoms. Best regards for relief.