I have been on yasmin for 4 years. and recently added spironolactone. i've been on the spiro a little over 6 months. recently i noticed veins becoming very apparent in my chest, breasts, arms, abdomen, legs, etc. could the spiro be causing this?

Skin and vein eval: If you are experiencing skin and vein changes then this will need to be evaluated by a doctor. It is not likely to be caused by these medications. Of note generally Yasmin and Spironolactone are not usually prescribed together. Yasmin and other birth control pills containing Drospirinone already have a anti androgen effect like Spironolactone. Using together could cause an elevated Potassium level