What travels over 600 mph and stops with a drop?

The speeds not quite right, 500mph, but allowing for variation in models and their speeds, I reckon that its a cruise missile.

And now I can get on with my life.

I don’t know about the cough drops you take, but the ones I had last “make your coughs more productive” rather than outright stopping them, I cough less often but when i do it is a major league hocker producer.

Odd. I’ve never heard of that. I’ve always seen cough drops that attempt to numb the throat. What was the active ingredient?