How long does Buzzy take to work compared to EMLA or LMX- 4?
Buzzy begins being effective on contact. One study found the total time for an IV with Buzzy was 3:50 seconds compared to 40.5 minutes with LMX-4. EMLA takes at least an hour for pain relief, but will vasoconstrict until 2 hours. For deeper Intra-muscular injections and medications that burn, Buzzy should be held on site for 1 full minute. For IVs, clean and go.