A number of studies show that echinacea and sage are just as effective as more expensive medicinal sprays marketed to fight coughs and sore throats. You can find this type of spray in many health food or alternative medicine stores, and it’s generally recommended that you spray your throat every couple of hours while you’re experiencing irritation.
You can also try making the spray yourself by mixing echinacea extract with sage extract and a little bit of saline water. Remember to check with a doctor first if you're on any medications, as some herbs can interfere.

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