Most studies administer elderberry in lozenge, capsule, syrup, or juice forms, with doses ranging from 175 to 900 mg/day (15 to 177 mL in liquid forms) over periods of 48 hours to four weeks when used for treatment, and for up to 12 weeks when used as a preventative measure.^{[4][5][6][7][8][9][10][11][12][13]}