The i-pill is meant for emergency contraception. It is NOT a regular contraceptive method and is unsafe to take more than once a month. Take the tablet immediately after unprotected sex.
It works best when taken within 24 hours. You may take it up to 72 hours after unprotected sex; after that, it may not work. (1)
A dosage of more than the one I pill tablet a month amounts to emergency contraceptive abuse exposing you to serious side effects.