Should I buy two Buzzy units if my child is getting more than one shot at a time?

The literature and scientific research doesn’t show that simultaneous shots cause less distress, but taking less time for injections does. Therefore, we have people who use two Buzzy units, and people who just use one, it depends some on how willing your doctor is to work with you. Older kids with cancer getting really painful injections in both thighs usually use two - there isn’t a firm right answer for this one.