make you more alert, help you feel more awake and ready to think or act, cause problems, to make bad things happen; to create difficulties, prevent, stop something from happening, cut the risk, makes the chance of something bad smaller, keep you awake, stop you from sleeping; make you not sleepy, increase a risk of, make it more likely that something bad will happen, it improves short term memory, it makes short term memory better, it contains, it has something inside, include, to have something as part of a group or set, reduce stress, make stress less; help you feel calmer, it connected with, it has a relation to something; it is linked to something, effects disappear, the results or changes go away; they are not there anymore

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