| IgE-dependent allergic reactions |
| Foods |
| Drugs (antibiotics, local anesthetics, hormones) |
| Stinging insects |
| Latex |
| Contact (fresh fruits and vegetables, animal saliva) |
| Direct mast cell-mediator release |
| Opiates |
| Muscle relaxants (succinylcholine, curare) |
| Radiocontrast agents |
| Perturbations in arachidonic acid metabolism within mast cells |
| Aspirin and other nonsteroidal anti-inflammatory drugs (NSAIDs) |
