More detailed information on how to use Buzzy to relieve pain for IV placement, splinters, shots, dermatology, and fingersticks can be found other places on this site, but here's an overview:

To help decrease shot pain directly, put ice pack behind Buzzy, then place Buzzy above the shot site "between the brain and the pain". (Check out the videos for specific sites of the body.)  Turn Buzzy on for about 15 seconds, longer for bigger body areas, then leave in place DURING the procedure.  For patients sensitive to cold, leave the ice pack off or allow them to hold it in their hand.

We have had infants and kids with sensory integration issues have successful shots holding Buzzy against their chest or stomach during shots, or just holding Buzzy in the opposite hand.  That wasn't what it was designed for, but hey!  whatever works.  Research supports that for younger kids focusing on sensations far away from the stick is effective, so this may be why.

Buzzy^®instructions are simple, but many health careworkers may need an explanation since the technology is new. Buzzy was developed with nurse and doctor input to ensure that the medical procedure wouldn't be compromised, and feedback from healthcare workers has been overwhelmingly positive for kids and adults who don't like shots.

Before Buzzy, for kids with needle fear: First, let your child see and experience Buzzy at home. Kids trust Buzzy more when they've already experienced how it numbs the skin, so let them see and activate Buzzy before going to the doctor.  This is also a good time to check whether they are sensitive to ice, or prefer the white or blue gel wings. When it's time for shots, let the nurse know you'll be using Buzzy. Explain that Buzzy will be turned on during the needle stick, but will be placed above the place where the needle goes, and won't get in the way. You can download a letter to the physician as well.

For immunization pain prevention, place Buzzy at the top of the shoulder or the top of the thigh, a few centimeters above where the shot will be. Turn it on, and 15 seconds later the nurse can give the shot. For lab draws or IV pain prevention, Buzzy can be attached to the arm with the included velcro strap so the arm can be held still.

Let your child have as many choices as possible. Let them choose whether they press the switch or you do and whether to watch the shot or not (believe it or not, up to 25% of kids prefer to watch!). Buzzy stops sharp pain, but light touch sensations are transmitted on different nerves. If your child is scared and focuses intently on the shot, they will be able to feel the touching sensation of the needle, and may translate this as distress and fear even though the sharp pain is controlled.

Use distraction cards or other methods to distract the child during the shot while Buzzy is still on or in place. You can use any of the distractions listed on this site (blow out a puff of air, add numbers, do a task) or have them use the optional distraction cards (find a color, watch it move, answer a question). For infants less than 5 months, use the red and black distraction card design and show or wave it about 15 inches from their face. For 6 months and up, use the bright colorful designs. For 15 months and up, games and distraction may be most effective.  

Once the shot is done, you can turn off Buzzy and put it away for next time!  If the medicine itself hurts (Humira, methotrexate, etc) rub Buzzy over the site, possibly using a fresh ice pack for extra numbing.