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Dosing of treatments: new Echinacea formulations (A and B) and conventional Echinacea formulations (C and D).
| Treatment group | Pharmaceutical form | Echinacea purpurea extract per unit | Daily dose days 1–3 | Daily dose days 4–10 |
|---|---|---|---|---|
| Formulation A | Lozenge | 3,360 mg | 5 × 1 | 1 × 1 |
| Formulation B | Spray | 1,200 mg | 7 × 2 | 2–3 × 1 |
| Formulation C | Tablets | 400 mg | 6 × 1 | 6 × 1 |
| Formulation D | Drops | 400 mg | 6 × 1 | 6 × 1 |
