This sounds pretty dubious to me. I'm fairly certain I read somewhere on the CDC website that needleless injections aren't any less painful than needles, and m

This sounds pretty dubious to me. I'm fairly certain I read somewhere on the CDC website that needleless injections aren't any less painful than needles, and may even be more painful. If I recall correctly, the advantages are reusability (no need to toss a needle after each injection) and portability (no need to carry around a pile of needles). As a side effect, they may be helpful to people who fear needles. I did a quick search and couldn't find any authoritative sources claiming that needleless injections hurt less.