Active substance

Carbon Monoxide + Helium + Oxygen + Nitrogen

3 products from 2 companies contain this in Canada.

3 prescription onlygas

Prescription only

CARBON MONOX0.3 % + 10.5 % + 21.5 % + 67.7 %gas Praxair Canada Inc · Carbon Monoxide + Helium + Oxygen + Nitrogen · V03AN CO-HE-O2-N2 MIXTURE0.3 % + 10.0 % + 21.0 % + 68.7 %gas Messer Canada Inc. · Carbon Monoxide + Helium + Oxygen + Nitrogen · V03AN20 LUNG DIFFUSION TEST MIXTURE GAS0.1 % + 10 % + 21 % + 68.9 %gas Praxair Canada Inc · Carbon Monoxide + Helium + Oxygen + Nitrogen · V03AN

Same substance is not the same product. Strength, form, release mechanism and other ingredients all differ. Whether one can replace another is a decision for a pharmacist.