That's a tough question to answer, and I think people should make that decision for themselves, with all the information they have about their particular situation.
Negative side effects of note with usual ADHD medication (amphetamine salts) include increased cardiovascular load, development of a tolerance (you need higher doses to achieve the same effect). Sometimes amphetamines induce small changes in personality, rarely full blown psychosis (this has happened at therapeutic doses!).
In general you should apply the same sort of risk-benefit analysis we use for every other drug. If you don't experience any side effects so strong you want to stop, and you believe you're aware of the risks, great.
If you're taking them without a script, I'd advise you to find a steady-state dose that works for you and stick to it. Don't let yourself increase the frequency or the dose without a conscious decision. That's how many people have spiraled.
Finally, I think it's important to have a lot of respect for psychoactive chemicals. Nature doesn't care very much for human overconfidence. If you start being careless, chemistry will do what chemistry does.
Negative side effects of note with usual ADHD medication (amphetamine salts) include increased cardiovascular load, development of a tolerance (you need higher doses to achieve the same effect). Sometimes amphetamines induce small changes in personality, rarely full blown psychosis (this has happened at therapeutic doses!).
In general you should apply the same sort of risk-benefit analysis we use for every other drug. If you don't experience any side effects so strong you want to stop, and you believe you're aware of the risks, great.
If you're taking them without a script, I'd advise you to find a steady-state dose that works for you and stick to it. Don't let yourself increase the frequency or the dose without a conscious decision. That's how many people have spiraled.
Finally, I think it's important to have a lot of respect for psychoactive chemicals. Nature doesn't care very much for human overconfidence. If you start being careless, chemistry will do what chemistry does.