"It was just a courtesy meeting," Ramadoss told reporters.
The two leaders met for a few minutes at the wedding of RSS ideologue S Gurumurthy's daughter here today, party sources said.
To a question on whether the party would support the BJP for the February 13 bypoll for Srirangam Assembly constituency, he said the PMK general council would take a decision on it.
Vijayakant, leader of DMDK, another NDA ally, also attended the wedding, but it was not clear if he met Shah at the venue.