migraine
"The medication itself works which is the only positive thing I can say.   This "needleless" injection is so much more painful than any needle I've ever experienced.  I'll be going back to real injections.  My leg is still throbbing in pain 30 minutes later and it took over 5 minutes to stop the bleeding!   I've never had pain or bleeding with an Imitrex shot through a hypodermic needle.  Who would choose this?"