Table 1.

Tramadol extended or controlled release formulations available in Canada/United States (as of November 2013)

	Zytram XL®	Ralivia™/Ultram® ER	Tridural®	Durela®
Distributor	Purdue	Valeant	Paladin	Medical Futures Inc.
Manufacturer	Purdue	Valeant/PriCara-Janssen	Labopharm	Cipher
Formulation	Extended-release 24 hours	Extended-release 24 hours	Controlled release 24 hours	Extended-release 24 hours
Dose strength available	75 mg, 100 mg, 150 mg, 200 mg, 300 mg and 400 mg	100 mg, 200 mg and 300 mg	100 mg, 200 mg and 300 mg	100 mg, 200 mg and 300 mg
Max dose	400 mg	300 mg	300 mg	300 mg

Note: Zytram XL® (Purdue Pharma, Pickering, ON, Canada); Ralivia™ (Valeant Pharmaceuticals, Laval, QC, Canada, trade name Ultram® ER in the US); Tridural® (Labopharm Inc., Laval, QC, Canada); and Durela® (trade name Conzip™ in US), Cipher Pharmaceuticals Inc., Mississauga, Ontario, Canada.