welcome to health care magic
is an SSRI
given as antidepressant. Its effects starts in 10-14 days. Starting dose is generally 25-50 mg. The symptoms described by could be due to switching to hypomania
(might be drug induced), however, drugs like sertraline are not known for that usually. I advise you to visit a psychiatrist
for detailed evaluation as it could be an isolated (not drug induced) manic/hypomanic switch.
Hope it helps
Dr. Gourav Monga