No prescription is needed. Age limit for Benadryl: 1 and older. If Benadryl is needed for more than a few days, switch to a long-acting allergy medicine (such as Zyrtec). Age limit: 6 months and older ...

The redness does not mean the bite is infected. Here is some care advice that should help. Zyrtec dosing for 6 months to 2 years: 2.5 mL (2.5 mg) every 24 hours. Zyrtec dosing for 2 years and older: ...