I cannot emphasize enough the importance of BRAND on effectiveness when railing zolpidem. The big pharmacy chains have all been carrying the same one (most of the time) for the last two years or so. It is by far the best one to rail. I don't believe I am allowed to name the producer of the generic, but anyway...
Railing zolipdem while on amphetamine is very pleasant, though it is a delicate balance, because you don't want to take too much zolpidem. But just a little will give the user a relaxed, euphoric feeling while maintaining good focus from the adderall.
Once you rail 20 mg or more of zolpidem, you should start having pretty interesting visual effects. Keep still and stare at a painting or something with coarse texturing. The image will take on fluid characteristics, undulating, expanding... very cool. Try staring "through" the image for the best effects. Depending on the picture, you can see movement in isolated parts. For example, I have a painting of a boat at a small dock on a lake. If I stare kind of "past" the boat, I immediately begin to see it rocking up and down as it would in real water. This is how I would know that my dose was sufficient to get in bed and sleep immediately.
For the brave: after railing at least 20-30mg, turn the lights down low and get a mirror, or go to your bathroom if you need to. Relax and look right through your reflection. Of course, your face will begin to warp, changing your appearance fundamentally. This is pretty damn freaky if you ask me.
I would not advise dosing more than 50 mg at a time (even that is extremely high). It is dangerous just like anything else. DO NOT combine with opiates in any significant amount, or you're asking for an OD. Also, do not ever leave the safety of your home if you've been railing zolpidem.
Zolpidem has an extremely short half life (2-3 hrs?) and leaves your system very quickly, especially if you're railing. The withdrawal from weeks of consistent use (or abuse) is interesting. The first night you won't sleep much of course, and you will feel like your heart is racing or having palpitations, though in fact your heart is probably beating quite normally. The phenomenon is pretty horrible though. On Day 1 you will be an anxious mess, seriously. Day 2 is pretty bad too. However, by Day 3 you can probably sleep again, and you may even feel "good" because you are emerging from the ambien fog.
The short withdrawal from zolpidem is a redeeming quality. Most of us are aware of the terrors of benzo withdrawal, which can potentially be long-lasting. Zolpidem is a "non-benzo" sedative hypnotic, though when looking for information on zolpidem withdrawal, it is usually lumped in with general Benzo withdrawal syndrome.
Anyway, msg me if you have any questions on zolpidem/combos that you would like answered based on my experiences
