How long do the effects of Albuterol last after administered via inhaler?

They work right away so if you don't feel any difference contact your doctor again because you might need a stronger one. They usually makes you start on the lowest one. Call him first and ask because it's possible that all you have to do is increase the dose instead of exchanging it to a stronger one. A tip would be to breathe through your mouth if you have Asthma instead of your nose, in order to receive more oxygen.