A good recipe for a strong cough

You need to take 0.5 kg of onions, finely chopped, add 2 tablespoons. honey, 2 glasses of sugar and 1 liter of water. Boil all this mass for 3 hours on low heat, and then take adults for 1 tablespoon, and children 1 tsp each. 3 times a day. With a very strong cough take 4-5 times a day.