Or, using TWO methods of birth control. No method of birth control is completely reliable except for not having heterosexual sexual intercourse at all. These steps must be taken even if you have a history of infertility, unless your uterus has been surgically removed or you have had no periods for at least 24 months. You must have a pregnancy test within 24 hours before beginning treatment. For women with irregular cycles, pregnancy tests must be taken every 2 weeks.
Some medications can reduce the effectiveness of birth control pills.
If you are being treated with any of these drugs, you should use two methods of birth control other than birth control pills or not have heterosexual sexual intercourse. Then you will be asked to sign a form saying that you understand the risks and the actions you must take to avoid them. You will be asked to complete a questionnaire for this registry. If you are under 18 years old, a parent or guardian must read the information and agree to comply with the instructions. You must never share Thalomid with anyone.