Is it true that being on clarithromycin will inhibit the enzyme responsible for breaking down mdma? if so, will taking m be harmful on this antibiotic

Taking MDMA harmful: ON any product. Over 80 kids just hauled away in ambulances at a Boston area concert for MDMA toxicity - probably "Molly," which is either higher dose/higher purity or contains some contaminants that seem especially toxic. This is really a potentially very dangerous drug, and on clarithromycin may be more so. I urge you to find healthier and less dangerous ways to have a good time.