When you're alert: You're most likely to retain studied information when you are fully awake and alert. If your sleep is not regular, you should correct that underlying issue first. What do you mean by "my brain is not working"? If you have new or worsening symptoms, see your physician. http://www.nlm.nih.gov/medlineplus/attentiondeficithyperactivitydisorder.html
Answered 9/17/2014
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