Taking medicine on Shabbat

Hi,

Medicine is prohibited on Shabbat, unless:
a) It is to save a life, or
b) Taking it involves only the rabbinic prohibition against medicine on Shabbat (as opposed to biblical prohibitions), and it is necessary to alleviate great pain.

However: One who needs a medicine which is only taken when mixed into food or drink may mix it into food or drink before Shabbat and take it, assuming that on-lookers will not know it is medicine, and assuming that the patient himself will do the mixing [as opposed to purchasing a pre-mixed product]. This ensures that the patient will remember and not mix and take it on Shabbat itself, and it ensures that no one will be mis-led regarding the general issue of taking medicine on Sahbbat."

(Rav Moshe Feinstein, Igrot Moshe Orach Chaim 2:86)

גמר חתימה טובה,
Mordechai