If you gobble down a bottle of Tylenol you’ll poison yourself, but no one does. People take hydroxy for a variety of ailments for years without incident, like taking a daily aspirin.
Well, the lethal dose for tylenol is far above the daily dosage for its intended purpose. The lethal dose for hcq is much closer to its proper dosage. So there is a larger risk of overdose than with most over-the-counter medications.
However, the media and the left just use that as an excuse, since if it is administered with proper medical supervision, the risk is negligible, as it is with most medications.