Q. See question above. Does one have to actually wait until one gets sick in order to consume medicine made of Kitniyos, or can one take it as a preventive means to avoid getting ill.
A. Horav Shlomo Millers Shlit’a opinion is that one should take it once the ill feelings begin.
Please double check if the pill you need can be obtained from other non Kitniyos sources.
See question 3122 on one who has to take pills during Pesach that contain Kitniyos, if one may preferably place his pill on a glass with water and then just swallow the pill with the water, and by lifting his head and ingesting it directly to his throat. We answered that it may not help at all.
When I consulted again the Rov Shlit’a and questioned why one should be stringent on preventive medical Kitniyos that have been totally changed from their original natural form and now even animals would not eat them. Therefore they should be permitted as many Poskim rule (See Piskei Teshuvos 442: 5), especially in this case when the likely symptoms are so severe, the Rov replied, that another Rov can rule to be lenient.
Rabbi A. Bartfeld as revised by Horav Dovid Pam, Horav Aharon Miller and Horav Chanoch Ehrentreu Shlit’a