In an executive order signed earlier this week, Duterte has ordered a nationwide ban on smoking in all public places.
The ban also includes vaping and the use of electronic cigarettes.
According to a report by the Southeast Asia Tobacco Control Alliance, there are some 17 million Filipino smokers, or almost one-third of the adult population.
But surprisingly, Filipino internet users on Twitter seemed pretty pleased about the move.
Under the new law, tobacco cannot be sold within 100 meters (330 feet) of schools, playgrounds or anywhere that children might gather.
Designated smoking areas will be set up for adults, but must be at least 10 metres away from building entrances or exits.
Duterte had earlier last year promised to crack down on vices such as smoking and illegal gambling.