
Lp(a) Hypthesis Survives HORIZON Trial Failure as Pipeline Drugs Show Stronger Reductions
The disappointing results of the Lp(a)HORIZON trial, which showed that the drug pelacarsen did not reduce major cardiovascular events despite lowering lipoprotein(a) levels, have not ended the search for Lp(a)-targeted therapies. Experts argue that differences in drug potency and trial design mean that other phase 3 trials, such as Amgen’s OCEAN(a) and Eli Lilly’s ACCLAIM-Lp(a), may still succeed. While pelacarsen reduced Lp(a) by 80%, newer small interfering RNA therapies achieve reductions exceeding 90%. Although the HORIZON failure raises questions about whether Lp(a) is a viable treatment target or merely a risk marker, clinicians emphasize that Lp(a) remains a crucial diagnostic tool for assessing cardiovascular risk.













