WASHINGTON — If President Donald Trump has his way, television viewers who see commercials for the drug Keytruda will learn not only that it can help lung cancer patients, but also that it carries a price tag of $13,500 a month, or $162,000 a year.

Viewers who see advertisements for Neulasta, a drug that reduces the risk of infections after chemotherapy, would learn that the list price for each injection is $6,200. And magazine readers would see a new bit