Even when Damon offered to take the Cure during season 6, Elena and Stefan doubted whether Damon would regret the decision. Once Dobrev departed the series, and her character was laid to rest for 60 years (give or take), it seemed Damon would remain forever and always a vampire.

Does Damon take the cure?

Stefan and Damon want to find the cure before Rebekah and Elena force Katherine to give it to them and Rebekah uses it. They want it to cure Elena, believing that it will solve the problems caused by Elena turning off her human emotions. Damon now holds the cure in his possession thanks to Alaric.

What season and episode does Damon take the cure?

'Vampire Diaries': Elena, Damon Taking Cure — Season 6 Episode 19 Recap | TVLine.