Unfortunately taking oral contraceptives come with the risk of melasma while in the sun....regardless of how much sunscreen you use. I use SPF 60 on my face every day because I have sensitive skin and I'm on Demulen, yet I developed melasma all around my eyes even while wearing sunglasses.
The bleaching creams are no longer available because they were deemed dangerous, but new products such as Fade Away, have emerged.
They work by blocking the development of melanin on the skin where applied. So as your skin cells regenerate and rewew the old skin sloughs off and the new skin should (in theory) emerge melanin free (and pigment free) if you apply the cream on the spots where you have the melasma. The cream should be applied to areas you are prone to developing melasma to avoid the pigmented spots in the first place....so even if you don't have melasma, you can potentionally avoid it by using these creams in addition to sunscreen.
I'm currently trying one of those products but it's too soon to determine its results as it takes three months and I've only been on it for two weeks.
While in Hawaii I developed melasma around my upper lip, but it went away a few weeks later. The spots I now have under my eyes are severe and won't go away on their own.
Wear a hat, sunglasses that protect from both UVA & UVB, wear a high sunscreen factor, and avoid the sun during peak times (i.e. 10 am - 4 pm) if possible. Basically, life stinks if you enjoy being outdoors in the summer, are on bcps, and are prone to melasma.
The doctors don't warn of this and most other side effects because they are covered (and quite frankly who knows of a doctor that has the time to go over every side effect of the medication they perscribe?). It is listed in the pamphlet included in the pack...and it's up to the patient to read it unfortunately. I always knew I was a risk but assumed I'd be safe since I use such a high SPF, but I was wrong.
Stay protected and be pro-active in your own health! Good luck!
-Bobbi