Praise be to Allaah.
We ask Allaah to heal you
and grant you good health, and to keep your spiritual and worldly affairs
safe and sound.
It is permissible to take
pills to prevent menses in order to be able to do acts of worship such as
i’tikaaf, ‘umrah and Hajj, but that is subject to the condition that they
should not be harmful to the body. As you are suffering from the disease
that you mentioned, you have to consult the doctor before taking these
pills, and make sure that they will not conflict with your treatment or
cause any harm to you. The Muslim is enjoined to take care of his body and
not harm it, because Allaah says (interpretation of the meaning):
“And do not kill
yourselves (nor kill one another). Surely, Allaah is Most Merciful to you”
“and do not throw
yourselves into destruction”
and the Prophet (peace
and blessings of Allaah be upon him) said: “There should be neither causing
harm nor reciprocating harm.” Narrated by Ahmad and Ibn Maajah (2341),
classed as saheeh by al-Albaani in Saheeh Ibn Maajah.
It says in al-Adaab
al-Shar’iyyah (2/463): It is haraam to use as a remedy anything that
causes harm. End quote.
Based on this, if these
pills are harmful then it is not permissible for you to take them, and you
can start i’tikaaf, then if your menses comes then you should leave the
mosque and stop i’tikaaf; this is an excuse for you to stop it, and in fact
it will be obligatory for you to do so because it is not permissible for a
menstruating woman to remain in the mosque.
But if they are not harmful
then there is nothing wrong with your taking them.
And Allaah knows best.