Does fasting become void and require making up for it if a woman uses a menstrual suppressant due to illness, and some yellowish or brownish discharge comes out along with that suppressant?

Yellowish and brownish discharges are not considered menses unless they occur during the habitual period or are connected to menstrual bleeding. If medication causes the discharge of either of these, it is not considered menses and does not prevent prayer or invalidate fasting, except in the case mentioned.