Anything that agonises the acetylcholine receptors, such as nicotine (no need to smoke - you could take nicotine lozenges, like I do as a non-smoker), or anything with choline in it: https://en.wikipedia.org/wiki/Choline#F ... of_choline
Low acetylcholine has been linked to dementia in the elderly so nicotine - without the toxic chemicals from cigarettes - has been proven to improve cognitive function: http://www.nhs.uk/news/2012/01January/P ... imers.aspx
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Is God willing to prevent evil, but not able? Then he is not omnipotent. Is he able, but not willing? Then he is malevolent. Is he both able and willing? Then whence cometh evil? Is he neither able nor willing? Then why call him God?
- Epicurus