I feel your pain, so to speak. My headache medicine has a limit of 9 pills each month, seriously 9!! So if a headache come more frequently i am just out of luck. I tried all over the counter stuff and nothing puts a dent into the pain...best one yet is BC powder. It lessens it but it is still there.
I was told those limits and prior authorization is to protect us. So we don't abuse the medications, but really it is also for them to monitor us and make sure we don't sell it on the street.