beta-blockers
2 interactions related to beta-blockers
cbd + beta-blockers
CBD weakly inhibits CYP2D6, the liver enzyme that clears beta-blockers such as metoprolol, propranolol, and carvedilol, so in theory it could nudge their plasma levels up. CBD also has a mild blood-pressure-lowering effect of its own. Both actions point in the same direction as the beta-blocker, but the CYP2D6 effect is weak and its real-world clinical significance has not been demonstrated in humans.
energy drinks + beta-blockers
Energy drinks and beta-blockers exert opposing cardiovascular effects: beta-blockers slow heart rate and lower blood pressure, while the caffeine and stimulant load in energy drinks pushes the sympathetic system the other way. This can blunt the medication's effect and, in susceptible people, help provoke an arrhythmia.