question: my mom went for some allergy tests monday and the doctor sent her a blood test also they told her the results would take up to 10 days to come back then the following day her gp phoned and asked her go and pick a perscription for fexofenadine hydrochloride but they didnt tell her what they were for. When she went and picked the perscription up the pharmasist told her they where to do with hemoglobin. could you please tell me if it because her hemoglobin level is to high?