I would never have convinced my Grandmother of that 50 years ago. She always recommended some horrid yellow medicine called , I kid you not; “666”. That was the formula. It tasted like liquified Ajax cleaner, with a little salt added.
We were also given “Father John’s Cough Medicine” which was at least tolerable. It tasted like a very old, very diluted malted milk shake.
It tastes like liquid Ajax with salt added...not sure how you know what liquid Ajax tastes like...
My Granny dosed us with a teaspoon of sugar saturated with kerosene (coal oil, as she called it.)