I don't think they can be any kind of use for cutting weight compared to many other options that have none of the other health risks of amphetamines. I would consider them more a performance enhancer such as meth because with controled admin. you can have serious short term increase in your senses, and increased heart rate and vessel constriction making you quiker, more agressive and increasing stamina.
I did some meth when I was 15 for that purpose of performance enhancing after hearing about how football players were touting the effects on performance. I did a line or 2 before a soccer game. (let's just say I was close to people in that scene, had done it a few times for rec, wasn't impressed but saw potential for PE). I was already the MVP on the JV team my soph year, I scored 11 goals in 13 games with 6 assists.
The day I did meth before the game I scored 2 goals in a 3-2 win (one of our few wins, we were like 5-8) and had to take myself out at half because my heart was beating too fast and I could have had a heart attack if I kept that incredible level of play up, I ran more in that first half than in 4-5 full games at forward. About the game and effects of doing meth, normally I didn't have very good touch, only insane speed and quickness and good vision along with a good passing and great shooting. That day I had the ball for 75% of the first half myself, the ball stuck to my feet something I couldn't imagine. I hit 1 shot from about 30 yards out which made me feel like I was 30 feet tall and I was playing against 2 foot tall midgets, I didn't really see the goalie on either goal, all I could see was the ball and the goal(my team was mostly freshman with only 2-3 good ones, I didn't try out for varsity I went out for the team late and it was all freshman, me and 1 ok junior).
The second goal was off a rebound from just outside the box and I remember thinking it was a goal before I touched it and it was instantly in the goal and I was getting lots of cheers because there was quite a few fans at the game for a jv game. We were up 2-1 and I coached from the sideline for the 2nd half and we won 3-2.
The other team sucked and that was the best 1/2 I ever played. I still don't agree with the use of amphetamines because they are too hard to admin. and the effects are unpredictable and often can result in great health consequences. I seriously could have died if I played the second half. If you do too much any physically strenuous activity is very risky. Not worth it, there are mental excercises that can increase your senses. As far as the heart rate/ circulatory constriction aspect, caffine can do at least a decent job.
For what it does, I'd rather not risk #1 arrest and imprisonment for drug poss. #2 death #3 forced complusive cleaning #4 whatever else that crap does to you.
As far as amphetamine as in cocaine, just like AAS, if it was pure pharm grade stuff I'd consider partaking if I was at scores with some hot strippers, lol.
No PE or effective dieting effects that a moron can't get with 1/20th the price Hydroxycut.