The flavonoids found in thyme, long-standing bronchitis treatment, may help ease coughs. Several times a day, sip thyme tea: Lightly crush 5 fresh or dried leaves. Place in a cup and fill with water cooled to just below boiling. Cover cup and leave to infuse for 5 minutes. Remove leaves and drink. Or take 1 teaspoon three to four times a day of Floradix Alpenkraft Herbal Syrup, ($18; luckyvitamin.com), which contains thyme.