Farrah Abraham is crediting ketamine for helping her squash her beef with Jenelle Evans.

The “Teen Mom” star tells TMZ … ketamine therapy is helping her move on from past traumas, and it allowed her to have a clean slate to start fresh with Jenelle after years of nasty feuding and drama.

Farrah and Jenelle made nice last week over dinner in Las Vegas … but she says it wasn’t the Mexican food that got her to give Jenelle another chance — it was ketamine.

Of course, Jenelle played a part too, reaching out to Farrah to congratulate her on her stand-up comedy debut at the Spearmint Rhino Gentlemen’s Club in New York City.

Jenelle’s going to host a divorce party at the club next month, and Farrah tells us she’s hoping to attend.

Another “Teen Mom” star who has feuded with Farrah over the years — Ashley Jones — was also at the dinner in Las Vegas and Farrah tells us how the two ladies smoothed things over.