Cut a lemon or lime into halves or slices, sprinkle about 1/2 to 3/4 teaspoon of salt and same amount of black pepper. roast/ oven bake/direct on gas fire/ barbecue/ cover it and micowave for 40 seconds, salt and pepper side on top till bubbly juice comes out. Let it cool down but don't let it go completely cold, it should be hot. Suck with the pulp direct from the lemon slices/halves as the peel has secreted some juices that you need. Same method can be used with sour oranges or tangerines.
This recipe came from my mum who used it on all her kids as natural alternative which would not give any side effect, to cure headaches, migraines, cough and colds, flu, as well as when someone feels sick as if they want to vomit. This is a ideal alternative medicine for diabetics and ideal for everyone as you don't have to go shopping, everything you'll have in your home when you have any of these problems. All of us brothers and sisters have been using this all these years, may be it might help someone who wants to try natural alternatives which would not give them any side effects especially if they are diabetics.