Are there any negative side effects of the pain killer Fioricet(Butalbital APAP Caffeine)?

Are there any negative side effects of the pain killer Fioricet(Butalbital APAP Caffeine)? My doctor prescribed Fioricet(Butalbital APAP Caffeine) to me for my migraines. My Rx says that I can take 2 pills – 4 times a day. Are there any known long term side effects from using this drug? I take them pretty regularly.…

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