The doctor who purportedly treated Prime Minister Najib Abdul Razak and his wife Rosmah Mansor has resigned as the vice-president of an anti-ageing organisation.

This was revealed by the president of the organisation Dr Selvam Rengasamy in a statement today.

"Dr Sidiq (Mohamed) has since resigned as vice-president of Sahamm (Society for the Advancement of Hormones and Healthy Aging Medicine Malaysia) as he does not want Sahamm to be dragged into a matter involving him in his personal capacity," he said.