Standard disclaimer: no one here is going to give you the answer you seek. Your best resource will be the Recruiting Center.
Notwithstanding the above, everyone's medical issues are judged on a case-by-case basis. Much depends on what you need the medication for, for how long, and the consequences of not having access to the medication. As well, the need for, and frequency of, reassessment will form part of the opinion. As a recruit, you are expected to be fit for all operational situations, in all geographical locations. This includes, but is not limited to, not being dependent on daily medication, the absence of which would cause an adverse outcome in your health.
Other standard disclaimer: the foregoing does not constitute professional medical advice, and is not a substitute for direction received from official CF sources.