Task: Determine the dominant emotion in the tweet and classify it as either 'neutral or no emotion' or one of the eleven provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: It’s possible changing meds is best not done while under stress. Difficult to tell what part of despair is circumstantial, what is drugs.
This tweet contains emotions: 
sadness