Io­n­is rolls out promis­ing PhI­II da­ta on volane­sors­en for rare en­zyme dis­or­der, but safe­ty ques­tions linger

Io­n­is has nailed down pos­i­tive Phase III da­ta on its lead ex­per­i­men­tal drug volane­sors­en, used to com­bat rare cas­es of fa­mil­ial chy­lomi­crone­mia syn­drome. But the biotech $IONS is still bat­ting back ques­tions about safe­ty is­sues as it preps for fil­ings with the FDA and EMA.

In the Phase III in­ves­ti­ga­tors re­port­ed a huge drop in triglyc­erides among the 33 FCS pa­tients tak­ing the drug, hit­ting the pri­ma­ry end­point. The place­bo arm saw the lev­el of triglyc­erides go up, help­ing to il­lus­trate the treat­ment ef­fect.

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