I'm guessing that you are redosing 20-30mg every hour or so when you say you took '90mg
between 8am and 1pm'. Even though these are pretty high dosages to take all within the course of about 36 hours- by 10 or 11 at night you'll likelybe able to sleep, though you're going to be in for an uncomfortable crash that could last from the time your last dose of amphetamine wears off and up until about 9-10 at night.
I would use the milligram of alprazolam for when you really come down-when your mind is exhausted and your muscles feel sore and tired, but you're still ssuffering from the peripheral stimulation caused by levoamphetamine (which btw, is why even when I decide to take a larger than average dose, I never go higher than 60mg-as opposed to the 20/22.5mg-30mg I normally will plug.)
I admit that it would be tempting to go a bit overboard if someone was giving me large [/indent]amounts of adderall (280mg !!!) but i would rather take a smaller, reasonable dosage and then save the rest for future good times. Perhaps I'm a lightweight as I've been seeing a few people mentioning taking upwards of 150mg of adderall (IR) throughout a single day, but it just seems like a waste when 22.5mg (plugged-I always plug adderall and dexadrine so I get better absorption out of the drug) gives me noticeable effects and 30-40mg (just dosed 45) has me feeling really good, smoothly stimulated and calm.
When it comes to Adderall, I would prefer to stop using for a week or so if my tolerance got so high that 30mg barely had any mood lifting effects because luckily amphetamine tolerance seems to go down incredibly quickly compared to say opiates or benzo's.
I find that even though the ratio of dextroamphetamine to levoamphetamine[/indent] is 4:1, it's really unnoticeable in lower doses (if anything I like it more as I feel it sometimes kicks off the effects faster that straight dextroamphetamine ), it can be very unpleasant at high dosages-30mg of Adderall/Mixed Amphetamines contains only 7.5mg l-amphetamine, but when you take 200mg of adderall, the amount of l-amphetamine is 50 milligrams.