Why it works: Onion strengthens the immune system, work as natural anti-biotics, anti-inflammatories, and contains expectorants that loosen up mucus so you can cough it up. It works like garlic but in a milder form, makes it more suitable for small children.
How it works: Chop one large onion to quarter size pieces and add to 2 cups of boiling water. Reduce heat and let it simmer for 15 minutes. Strain, wait for it to cool down a little and drink.
Precautions: Onion might slow blood clotting and lower blood sugar. Use caution if you have bleeding or blood sugar related conditions.
Stop taking high dose of onion (i.e., as a medicine) at least two weeks before a scheduled surgery.
The self cure remedy of Take onion soup for the care and relief of Cough has an effectiveness score of 3.2 and a popularity score of 58 on the self-cure system.