Brooke Shields has hit back at former friend and actor, Tom Cruise, for criticising her "misguided" use of drugs to confront her post-natal depression.

Cruise, who claims to have helped people fight drug addictions through his controversial Scientology religion, recently attacked the Suddenly Susan star for becoming dependant on Paxil, following the birth of her daughter, Rowan.

But Shields, outraged by the Top Gun star's "dangerous" comments, took a swipe at his Scientology beliefs, by saying she wouldn't take advice from someone who devotes his life to creatures from outer space.

"His comments are dangerous. He should stick to saving the world from aliens," Contact music quoted her as saying.

At present Shields is weaning herself off her medication so that she and her husband, Chris Henchy, can have another child.