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Adults can safely consume peppermint as a tea by steeping on teaspoon of the herb in hot water for 10 minutes. Four to five cups of the mix can be consumed each day to alleviate cold symptoms and post-nasal drip, and to help get rid of a metallic taste in your mouth.
The sensation of post-nasal drip is not usually caused by an increased amount of mucus coming from your nose or sinuses, says Dr. Dolan. âIt is more likely to be caused by the mucus becoming too thick or by irritation of your throat.In my experience, the three most common causes are allergy, gastric reflux, and medications that cause dryness.â. Here are some other common conditions that may cause post-nasal drip: 1  Cold or flu viruses.2  Sinus infection.It is more likely to be caused by the mucus becoming too thick or by irritation of your throat. In my experience, the three most common causes are allergy, gastric reflux, and medications that cause dryness.â. Here are some other common conditions that may cause post-nasal drip: 1  Cold or flu viruses. 2  Sinus infection.