Question:
Dear Rav,
I have an anxiety disorder which my psychiatrist proscribes medication and when I even mess up the dose I can get severe depression. How can I take the medication on yom kippur if I can't swallow the pills without liquid?
Answer:
A person that has to take medication on Yom Kippur, and he can not swallow the pill without any water may take the pill will a minimal amount of water, but the water should be made bitter so that he does not benefit from drinking it. This can be done by adding vitamin C to the water or anything else that is not toxic but will make the water bitter such as dishwashing soap.
Sources:
Kovetz Halachos Yamim Noraim 31-47,