The best natural drugs to keep motivation and ambition at a sustainable level consistently are lots of exercise, balanced diet, enough sleep and some sort of mi

The best natural drugs to keep motivation and ambition at a sustainable level consistently are lots of exercise, balanced diet, enough sleep and some sort of mind/mood/memory enhancing processes such as meditation, tai chi, Yoga or some sorts of light martial arts training. All those chemical drugs available on market have a saturation effect where you take the drugs for few days or few months and then your brain gets either used to it or saturated (by saturating the receptors in brains or by some other still unknown mechanisms) and you begin looking for other alternatives. There are also other ways to keeping yourself motivated. As per example, 1. Surround yourself with people with positive attitude and have achieved some great progress in which field you would like to excel. 2. Read some books or listen to some podcast everyday and that will keep you motivated to work towards your goal. 3. Meet with people from different fields and try know what they are doing and how they are achieving it. 4. Last but not least keep a goal in your mind (not too absurd or very easy) and try everyday a little to hammer it consistently. There is no drugs or panacea available that will keep you motivated without a proper goal in your mind. However, these are my personal suggestions and reflections, not to be taken as legal or health related opinion. If you think you seriously need any drug then you should consult a physician before popping up any Over The Counter pills by yourself. Those can backfire in a serious and unthinkable way.