Butalbital/Aspirin/Codeine/Caffeine, Oral: References

FIORINAL WITH CODEINE (butalbital, aspirin, caffeine, and codeine phosphate capsules). Accessed March 1, 2015 from: http://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=ace223cc-458e-4455-a64e-83e5cbf95f9a

Butalbital/Aspirin/Caffeine/Codeine Phosphate. DRUGDEX System. 2015 Truven Health Analytics, Inc. Accessed March 22, 2015 from http://thomsonhc.com.