What is the correct dosage of allegra (fexofenadine)?

Allergra dosing. < 6 mos. Not recommended 2-11 years old; 15- 30mg (1/2 -1 tsp) once or twice per day 12-18 and older: 60 mg once or twice /day adult: 180mg once per day ( or 60 mg twice per day).
Depends on age. For small children, the dose is 30 mg twice daily. For adults, the dose is 180 mg once daily.