1) Acceptability 2) Suitability 
Tolerability refers to the degree to which overt adverse effects of a drug can be tolerated by a patient. Tolerability of a particular drug can be discussed in a general sense, or it can be a quantifiable measurement as part of a clinical study. Usually, it is measured by the rate of `dropouts,` or patients that forfeit participation in a study .....
the degree to which a drug or other agent produces adverse side effects.
Tol`er·a·bil'i·ty noun The quality or state of being tolerable. [ R.] Fuller. Wordsworth. 
tolerability 1. Capable of being tolerated; endurable: 'The teacher said the student's arrogance is no longer tolerable.' 2. Being fairly good; passable; not bad.