Can Ginette Pill Give Full Protection To Avoid Pregnancy?

Hi, I am currently taking the Ginette pill. I have been taking it for about 5 years now since my dermatologist prescribed it for my skin problem. I would like to know if this particular pill is any different in efficacy as a contraceptive when compared to other contraceptive Pills?

I'm not sure if i should change my pill for another brand as i do not want to fall pregnant any time soon. I am 28 years old.

Your help would be greatly appreciated.

Kind Regards,

Nicky(south africa)