TABLE 19-1 - Effectiveness of agents used in treatment of allergic disorders
| Drug Class | Sneezing | Pruritus | Rhinorrhea | Congestion | Inflammation | Onset of Action |
| Antihistamines | ++++ | ++++ | +++ | + | - | Rapid |
| Sympathomimetics | - | - | + | ++++ | - | Rapid |
| Glucocorticoids | +++ | +++ | +++ | ++++ | ++++ | Slow (days) |
| Cromolyn-nedocromil sodium | ++ | + | + | + | ++ | Slow (weeks) |
| Anticholinergics | - | - | ++++ | - | - | Rapid |
| Immunotherapy | ++++ | ++++ | ++++ | ++++ | ++++ | Slow (months) |
Table 19-1. Effectiveness of agents used in treatment of allergic disorders