This is great to have at hand. I purchased the big 10L to keep at home and a pocket size. I have made more than one purchase because this really works. It works fast for sudden shortness of breath. This does not replace an asthma inhaler so please do not confuse the two. An Asthma inhaler opens airways. This is just a boost of oxygen for a short time. It is not meant to treat medical conditions either. It is just when you need a sudden boost of oxygen. I had say 97% room air oxygen reading taken with a pulse oximeter. With a puff from this can my oxygen was boosted temporarily to 99%. I am never 99% so I am impressed with the boost of oxygen.
Verified purchase: No
I have copd and I can not say that I can see that it helps.
Verified purchase: Yes | Condition: New
Works very well
Verified purchase: Yes | Condition: New
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