On the stipulation that: 1) They have been 'proven' empirically to have the advertised efficacy in the general population. Different tasks require different ki

On the stipulation that: 1) They have been 'proven' empirically to have the advertised efficacy in the general population. Different tasks require different kinds of attention and thinking. 2) There are absolutely no mental or physical potentials for addiction 3) There are absolutely no deleterious mental, physical or general health effects. Caffeine gets 0/3, so I don't drink it. > - modafinil >- piracetam >- amphetamines >- beta blockers > - ritalin None of these pass any of the three requirements. Two of them have the fun potential for inducing psychosis in the general population, I have a friend who had a psychotic break after being prescribed amphetamines for ADD. If you mix beta-blockers with stimulants, you can cause paradoxical hypertension and die. Beta-blockers also build up a tolerance and you will have rebound hypertension. Also people say they cause hair loss, but I attribute that men are typically prescribed them at an age where hair loss is natural. Modafinil is thought to work by inhibiting GABA release through a similar mechanism as opioids, but in different parts of the brain and not to such an extreme extent. From what I've read, a pattern of abuse and withdrawal can develop with this substance. Piracetam has a withdrawal, and needs supplementing with other nutrients to be effective. If any of the above work for you, kudos. I don't want to live in a world where I am pressured into taking drugs on the off chance I might provide more value to my employer at the expense of my health, just because other people are willing to risk it for a job.