Viewers were unsure over the gritty scene, which aired just before 9pm
Broadcast watchdog Ofcom has received 82 complaints from Coronation Street viewers over a scene involving drug use.
The scene saw vicar Billy Mayhew, played by Daniel Brocklebank, taking heroin in a church alongside his brother Lee, played by Richard Crehan.
After taking the Class A drug, Lee tells Billy: “This must be what heaven feels like.”
It aired before the 9pm watershed during the second episode of Monday’s double bill.
A spokeswoman for Ofcom said: “We are assessing these complaints under our broadcasting rules, before deciding whether or not to investigate.”
An ITV spokeswoman said: “Coronation Street has a strong tradition of tackling serious contemporary issues in a responsible way.
“In upcoming episodes we will be showing the very negative side of drug taking as Billy’s life starts to fall apart.”
The spokeswoman added that the storyline was researched thoroughly with the help of the team at Addaction (www.addaction.org.uk).