That's pretty typical....I use it before I jog but have found that I really don't have much of a reaction if I start jogging at 15 minutes after...if I wait much longer I'll start having the shakes....but that's the only time I use it unless some odd aberation occurs...like this spring a couple of times at night I woke up having trouble breathing. And then I did have shakes, etc after using the albuterol...was not realistic to go job at 3;30 AM! good look...