Did your doctor tell you how he suggested you determine when to take the medication?
Did he mention the Cocci skin test and titration to include what level titrate is normal for an Arizonan (maybe 1:4, or thereabouts) and what level of titrate, or titer indicates medication treatment is recommended.
What type of doctor is he. I hope he's something other than a General Practitioner, or internist, i.e., he should be someone with infectious disease (read Coccidioidomycosis) expertise and experience. Is he?