How many mcg per day you using?
How big is one dose for you?
20mcg has me coughing shit up and nose running for the first couple hours, a bit jittery, but I know it all passes, as it is a bronchodilator and I have a lot of sht built up especially during allergy season.
If you can't handle, my suggestion is ECA stack. No sense going through the punishment of all that!