Clinic visits are usually short. You have to convey the last several months in that time, and if you try to say everything, the time runs out first, leaving the very thing you wanted to ask unasked.
The most effective preparation is picking two or three things ahead of time: one thing that repeats, one thing that has changed recently. With just these two, the conversation usually flows in that direction.
When picking, it helps to translate it into times and counts. If, as in the graph above, the dose interval stays the same but the held stretch keeps getting shorter, then “it drops off about three hours after I take it, and that happened five days this week” conveys far more than “my medication doesn’t last as long these days.”
I’d also recommend writing down your questions ahead of time. They rarely come to mind in the exam room, and only occur to you once you’re home. Two lines are enough.