The main differences between Crisanta and Crisanta LS are the dose and number of pills in each pack. Crisanta LS (ethinyl estradiol) is a lower dose, and contains 24 pills per strip. Crisanta carries a regular dose and contains 21 pills per strip. There’s no difference in how effective they are protecting against pregnancy.
If you’ve used a regular or higher dose pill before and had side effects, you might be recommended Crisanta LS. It might also be better for you if you have medical conditions that mean you’re more likely to have side effects on higher doses of oestrogen.