Using a spacer with a puffer aids with delivering medication evenly to the lungs. For this reason, using a spacer with a puffer is much better than using a puffer alone.

Children should use a spacer to take their medicine, for both reliever and preventer puffers.
Adults and adolescents are recommended to always use a spacer with their preventer puffer, though they can use their reliever puffer with or without a spacer.

One puff of medicine should be sprayed into your spacer at a time. If more than one puff is added, the medicine sticks together and then drops to the bottom of the spacer before you have time to breathe it in.

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Spacers can only be used with puffers