Study of efficacy and safety of a new local cream ('healer') in the treatment of chronic anal fissure: a prospective, randomized, single-blind, comparative study.

Objectives: To determine the efficacy and safety of 'healer' cream as monotherapy in the treatment of acute and chronic anal fissure.

Study Design: A prospective, randomized, single blinded, comparative trial.

Methods: Sixty patients suffering from anal fissure were included in the study. Patients were randomly divided into three groups: group A: treated with 'healer' local cream application 3 times daily; group B: treated with nitroglycerine 0.25% local cream 3 times daily; group C: treated with a lidocaine 2% cream applied locally 3 times daily. All the followings were followed up and compared between groups. (1) Visual pain analogue score after defecation; (2) severity of straining and discomfort during defecation; (3) frequency of ulcer healed at 30 days; (4) any side effects or complications.

Results: The pain scoring after defecation was significantly reduced in the three treatment groups. The group treated with 'healer' isosorbide-di-nitrate showed the greatest reduction of the visual pain analogue score median from 9 before treatment to 3 & 1 after 10 and 20 days respectively, while the median visual pain analogue score in group B treated with nitroglycerine cream was 9 reduced to 4 & 2 after 10 and 20 days respectively, and the median visual pain analogue score in lidocaine group only dropped from 9 to 6 and 4, respectively. The reduction of both pain scoring and defecation scoring with 'healer' was statistically significantly greater than the other two treatments by Kruskal-Wallis test, P<0.001. The number of patients experiencing complete relief and passing stools easily after 10 days was significantly higher in 'healer' group, by Pearson Chi square = 22.94, P<0.001. After 30 days, the fissures were healed in 18 (90%) of 20 patients in the 'healer' group and in 12 (60%) of 20 in the nitroglycerin group, while only 6 (30%) of patients treated with lidocaine cream had their fissures healed by the 30 days treatment. Chi square = 15 (P = 0.001).

Conclusion: 'Healer' is a promising effective and safe line of treatment in acute and chronic anal fissure. The characteristic pharmacokinetics of isosorbide-di-nitrate leads to a better effect than nitroglycerin in healing (more prolonged action). Also the less fast absorption than nitroglycerin leading to a smoother dose concentration curve, may be the cause that headache is less frequent and less severe in 'healer' treatment versus nitroglycerin.