"All set for #MannKiBaat! See you on air," Modi tweeted.
"As I said during the last programme, this time I would talk about the menace of drugs," he added.
In his second 'Mann Ki Baat' programme on November 2, Modi had said that some people had written to him about the drug menace. He had then asked people to share their views and suggestions on the issue.
"Several people shared ideas, comments & insights on the topic which have been both eye-opening & helpful. My thanks to them for contributing," he posted in another tweet.
The Prime Minister has said he will share his thoughts with the countrymen over radio every month through the 'Mann Ki Baat' programme.