Which algorithm helps me to find worst event of a drug

Hello Expert,

Suppose consider a scenario where a patient took drug (X) and develop five possible side effect (X-a, X-b, X-c, X-d,X-e). I need to identify the worst side effect from a-e

I took few parameters (like seriousness of event, suspected etc)  to choose the event.

If parameter 1 is present (i.e. event is serious), then a score of 1 is given. If not, score=0, if both condition not satisfied, score=-1
Could you please guide me which algorithm should I choose to find the event with high score or any alternative approach do u prefer.  I am currently using R programming as tool for analyis.