Commonly reported side effects for Fioricet include:
- Euphoria
- Dizziness
- Drowsiness
- Intoxicated feeling
- Light-headedness
- Nausea
- Vomiting
- Sedation
- Substance dependence
- Shortness of breath
- Abdominal pain
Fioricet is implicated as causing repeat headaches with over-use.