Benzonatate is a commonly prescribed somewhat stronger cough medicine which requires a prescription. I've known a number of people who've had to take it for a p

Benzonatate is a commonly prescribed somewhat stronger cough medicine which requires a prescription. I've known a number of people who've had to take it for a persistent or stubborn cough. Wikipedia says "Overdose of only a small number of capsules can be fatal" but the study they quote shows that you'd need to take 10x-20x the usual dose for the smallest amount that's been shown to kill anyone -- which is admittedly more narrow of a safety window than over-the-counter Tylenol/Acetaminophen/Paracetamol but still, few people take 10-20 pills in one day of something that says "take 1 per day".