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Colds and Flus
• Upper Respiratory Infections; Influenza
A cold is an infection that can bother the nose and throat. It is caused by a virus. Influenza (flu) is a viral infection that may cause problems with breathing. The flu can make you a little sick or very sick. Sometimes it can lead to death.
Both the cold and the flu can cause problems that get in the way of daily tasks. Both are treated with home care and over the counter drugs. But the flu may need prescription drugs. A flu shot can also help stop you from getting the flu. Some people turn to natural therapies to treat health problems and lower the risk of a bacterial infection.
May or May Not Be Effective
Editorial process and description of evidence categories can be found at EBSCO NAT Editorial Process.
Herbs and Supplements to Be Used With Caution
Talk to your doctor about all herbs or supplements you are taking. Some may cause problems with your treatment plan or health conditions. Some supplements discussed here have certain concerns such as:
References [ + ]
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A2. Tesche S, Metternich F, Sonnemann U, et al. The value of herbal medicines in the treatment of acute non-purulent rhinosinusitis: Results of a double-blind, randomised, controlled trial. Eur Arch Otorhinolaryngol. 2008 Apr 25.
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B1. Coon JT, Ernst E. Andrographis paniculata in the treatment of upper respiratory tract infections: a systematic review of safety and efficacy. Planta Med. 2004;70:293-298.
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B5. Saena RC, Singh R, et al. A randomized double blind controlled clinical evaluation of extract of Andrographis paniculata (KalmCold) in patients with uncomplicated upper respiratory tract infection. Phytomedicine. 2010 Mar;17(3-4):178-185.
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C1. Josling P. Preventing the common cold with a garlic supplement: a double-blind, placebo-controlled survey. Adv Ther.2001;18:189-93
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C6. Prasad AS, Beck FW, Bao B, et al. Duration and severity of symptoms and levels of plasma interleukin-1 receptor antagonist, soluble tumor necrosis factor receptor, and adhesion molecules in patients with common cold treated with zinc acetate. J Infect Dis. 2008 Feb 15.
C7. Rautava S, Salminen S, Isolauri E. Specific probiotics in reducing the risk of acute infections in infancy—a randomised, double-blind, placebo-controlled study. Br J Nutr. 2008 Nov 6.
C8. Cox AJ, Pyne DB, et al. Oral administration of the probiotic Lactobacillus fermentum VRI-003 and mucosal immunity in endurance athletes. Br J Sports Med. 2010 Mar;44(4):222-226.
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Traditional Chinese Medicine
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D2. Wang C, Cao B, Liu QQ, et al. Oseltamivir compared with the Chinese Traditional Therapy maxingshigan-yinqiaosan in the treatment of H1N1 influenza: a randomized trial. Ann Intern Med. 2011;155(4):217-225.
D3. Li G, Cai L, et al. Compound formulas of traditional Chinese medicine for the common cold: systematic review of randomized, placebo-controlled trials. Altern Ther Health med. 2015 Nov-Dec;21(6):48-57.
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E2. Murdoch DR, Slow S, et al. Effect of vitamin D3 supplementation on upper respiratory tract infections in healthy adults: the VIDARIS randomized controlled trial. JAMA. 2012 Oct 3;308(13):1333-1339.
E3. Hemilä H, Chalker E. Vitamin C for preventing and treating the common cold. Cochrane Database Syst Rev. 2013 Jan 31;(1):CD000980.
E4. Ginde AA, Blatchford P, et al. High-dose monthly vitamin D for prevention of acute respiratory infection in older long-term care residents: a randomized clinical trial. J Am Geriatr Soc. 2017 Mar;65(3):496-503.
Last reviewed February 2019 by EBSCO NAT Review Board
Richard Glickman-Simon, MD
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Telephone: (615) 344-6060
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