But the 33-year-old tells The Associated Press that when he was shot in the jaw in 2000, he could drink only liquids and his weight dropped to 157.
He says that "it was a lot tougher" this time.
The film is about the rapper's childhood friend who died of cancer and is in production. The rapper says he currently weighs 198 pounds.
He released his fourth album in November and kicks off a North American tour in Detroit on Saturday.