Here are the findings of a recent meta-analysis:
After a PubMed search, we conducted a meta-analysis of available studies (clinical nonrandomized registries) on efficacy of drug therapy in preventing recurrence of TTC.
A total of 23 (4.5%) TTC recurrences occurred in the 511 patients included in the analysis. Seven studies on the effects of β-blockers on prevention of TTC recurrence were evaluated; the odds ratio (OR) was 0.44 and the 95% confidence interval (CI) was 0.15-1.31. In 5 studies on the effects of angiotensin-converting enzyme inhibitors/angiotensin receptor blockers, the OR was 0.42 and the 95% CI was 0.08-2.36; in 3 studies on statins, the OR was 0.74 and the 95% CI was 0.07-7.3; and in 4 studies on aspirin, the OR was 0.33 with a 95% CI of 0.05-2.17 (P value not significant in all cases).
A meta-analysis of the efficacy of different medications through the clinical TTC registries available showed no clinical evidence for a standard drug treatment in the chronic management of TTC. β-Blockers, angiotensin-converting enzyme inhibitors/angiotensin receptor blockers, statins, and aspirin do not seem to significantly reduce recurrences of TTC. Randomized, adequately powered studies are needed to further assess this issue.
Only low level data were available for this meta-analysis and better studies are needed.