What is maderma? Is that the medicine for scars and stretch marks??

Yeah

My friend had really bad stretch marks after she had her daughter and she used mederma, she said it lightened them a bit, but thats all.

Oh, do you know of anything that works beyond just lightening them a bit?

I don't think there is anything that will actually take them completley away since they're scars...But im not sure.

Only sure way I know is costly laser surgery

Definitely laser surgery. You have to use mederma for practically a year before it works and it's expensive, so laser surgery isn't that bad of an option.