Philippine President Rodrigo Duterte on Thursday said he was willing to face the music for his war on drugs and a complaint filed with the International Criminal Court would not stop him pursuing his bloody campaign.

The former prosecutor said he was man who was true to his word, including wiping out drugs, so he would accept the consequences, even if it meant prison, or death.

"I will continue my campaign ... I just stood by with my promise, all other politicians they pay lip service to the problem," he told reporters.