My girlfriend has been taking yasmin (drospirenone and ethinyl estradiol) pill but we have noticed that her sex drive is always getting worse, could it be affected from the pill?

Yes: Though there are many causes and reasons for loss of libido and decreased interest in sex, this is not a rare or uncommon side effect of birth control pills including yasmin (drospirenone and ethinyl estradiol).

Yes, it can: There are complaints all over the internet about yasmin (drospirenone and ethinyl estradiol) destroying a woman's libido. Just type on ant search engine: yasmin (drospirenone and ethinyl estradiol) and libido and you will quickly see what i mean.