Is topical spironolacton (2%) safe for pattern baldness (24 yr male)? Is it effective for that matter? I am not able to find authentic studies online!

See a dermatologist. Oral spironolactone is for women, not men unless you don't mind needing a bra. Topical spironolactone has not been studied. You should be on a formal protocol if you wish to be a test subject.