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Occurrence of adverse events, by treatment group
| Adverse event | Group, no. of patients | |
|---|---|---|
| Nifedipine and lidocaine, n = 135 | Lidocaine, n = 135 | |
| Headache | 5 | 4 |
| Sphincter pain | 1 | 1 |
| Hypertension | 1 | 0 |
| Fecal incontinence | 1 | 0 |
| Nausea | 1 | 2 |
| Vomiting | 1 | 0 |
| Bleeding upon defecation | 1 | 3 |
| Anal burning | 2 | 0 |
| Perianal edema | 2 | 0 |
| Edema of the wound | 1 | 0 |
| Anal itching | 1 | 0 |
| Fever | 0 | 1 |
| Dizziness | 0 | 1 |
| Asthenia | 0 | 1 |
| Total | 17 | 13 |
