I'm thinking of taking an atenolol. My heart's racing and I'm getting tightness in my chest. Not painful, but I'm on DXM, so pain is just a sensation. Will let you know if I experience symptoms of high blood pressure after the beta blockade of adrenaline (the reason you don't want to take a beta blocker for stimulant-induced tachycardia).
Note: I have verapamil, a vasodilator that lowers blood pressure, so if I start getting dizzy and nauseous I will take that to restore homeostasis. The best option right now would be a benzodiazepine, but I have none, therefore this is my only other option. On a side note, verapamil is actually recommended to reverse vasoconstriction of cocaine.