Former Chief Minister O. Panneerselvam left the city on Sunday, after a few days of Ayurveda treatment at the Arya Vaidya Pharmacy here. Sources said Mr. Panneerselvam got admitted at the AVP at Ramanathapuram on Wednesday. After three days of treatment, he left by road on Sunday. On the way, he prayed at Eachanari Vinayagar Temple and Masaniamman Temple.