Task: Categorize the tweet's emotional tone as either 'neutral or no emotion' or identify the presence of one or more of the given 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