Hi sugar2autumn,
I'm not sure why you are taking fioricet, but it is a good idea to discuss your concerns about your menstrual cycle with your GYN. If I'm not mistaken fioricet won't make you stop or start your menstrual cycle, but I am not a medical professional.
Are you taking fioricet for Migraines? Because ANY use of opioids or barbiturates and frequent use of triptans and NSIADs are associated with increased risk of transformed Migraine. See Transformed Migraine - Risk Increased by Some Medications for more information on this.
I hope this helps,
Nancy
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