Tea has fractions of the mg caffeine that coffee does. It makes sense pharmacologically that you have a higher tolerance than only tea drinkers. I wouldn't recommend using methamphetamine, it is a prescription for ADHD, taking it lightly is not advisable. You can use tea as a tolerance reducer instead, take it on off days instead of coffee.
Methamphetamine is not a prescription for ADHD. Dextroamphetamine, amphetamine, and Methylphenidate are.
They also have controlled release mechanisms and are available in therapeutic doses.
It is not the same thing as buying however much you want of a significantly stronger stimulant and taking and instant hit.
And to anyone not prescribed those medications that are obtaining them for recreational usage, you make an already difficult life of ADHDers much worse, as some are denied an effective, life-changing treatment because of this.
Methamphetamine is sometimes prescribed for ADHD under the name "Desoxyn". While medical professionals appear hesitant to do so, patients who are prescribed Desoxyn rate it much higher than other ADHD drugs.
Neurotoxic at high doses that is. Meth is FDA approved for ADHD and used therapeutically, I take it. It’s certainly the cleanest smoothest gentlest and most effective thing I’ve tried and I’ve tried it all.
Actually (green) tea leaves have more caffeine per gram than coffee beans do, but in general you use more coffee (~60 g/l) for your cup than tea leaves (~12 g/l) and hotter water, so more caffeine is released.
However, tea leaves are safe for consumption, so you could eat them instead (for example as a salad).
I drink Yerba Mate tea as a substitute. It contains more caffeine than other teas, plus you can drink it out of a cool gourd. Might be worth giving a try!