The treatment for sinusitis in a young child with a penicillin allergy is:

3rd Generation cephalosporin - Cefdinir (Omnicef)

Aminopencillin - Amoxicillin (Amoxil)

Sulfonamides - Sulfamethoxazole/Trimethoprim (Bactrim)

Tetracycline - Doxycycline (Vibramycin)