| Adverse event | % of respondents (weighted)* | |
|---|---|---|
| Ever consumed energy drinks n = 1516 | Ever consumed coffee n = 1741 | |
| "Jolt and crash" episodes (increased alertness and energy followed by sudden drop in energy) | 22.5 | 9.7 |
| Headache | 18.3 | 11.5 |
| Jittery/shaking | 26.5 | 17.0 |
| Difficulty sleeping | 24.1 | 16.5 |
| Fast heartbeat | 24.7 | 10.5 |
| Chest pain | 3.6 | 1.7 |
| Nausea/vomiting/diarrhea | 5.1 | 5.1 |
| Seizures | 0.2 | 0.2 |
| Decreased sexual performance | 0.5 | 0.3 |
| Dental pain | 1.8 | 0.8 |
| Other | 0.8 | 1.5 |
| None of the above | 39.7 | 60.8 |
| Don't know/refuse to answer | 4.3 | 2.9 |
*Percentages do not total 100 because respondents could select multiple responses.