This is not advisable to use birth control pills by the ladies, for prolonged use it may have side effects and may harm the important organs of the body.
You can use condoms for birth control or if you like to go for permanent remedy than adopt sterilization and enjoy for the whole life.
The pills also may cause other complications like general weakness, laziness, headache, loss of appetite and sometimes may have minor itching over the body. It also depends upon the body to body means it may not be suitable for all the users. So better avoid to take these pills and not to spoil the health.