Alternative treatments used for the common cold
Alternative treatments used for the common cold include numerous home remedies and alternative medicines. Scientific research regarding the efficacy of each treatment is generally non-existent or inconclusive. Current best evidence indicates prevention, including handwashing, and management of symptoms.
There is strong evicence that zinc acetate lozenges shorten the duration of colds. Three high dose trials with zinc acetate found an average 42% reduction in the duration of colds. There is no concern of zinc toxicity in the dosage that were used in the zinc acetate trials with 80-100 mg/day of elemental zinc.
Vitamin C was identified in the early part of the previous century and there was much interest in its possible effects on various infections including the common cold. A few controlled trials on the effect of vitamin C on the common cold were carried out already in the 1940s, but the topic became particularly popular after 1970, when Linus Pauling, a double Nobel laureate, wrote a best-selling book Vitamin C and the Common Cold. Pauling's book led to great interest in the topic among lay people, but also among academic circles. After Pauling's book, a number of controlled trials were carried out. However, the interest disappeared after the middle of 1970s apparently due to the publication of two reviews and one primary study, which all concluded that vitamin C does not influence the common cold. However, the three papers were later shown to be erroneous.
According to the Cochrane review on vitamin C and the common cold, 1 g/day or more of vitamin C does not influence common cold incidence in the general community. However, in five randomized double-blind placebo-controlled trials with participants who were under heavy short-term physical stress (three of the trials were with marathon runners), vitamin C halved the incidence of colds. In the dose of 1 g/day or more, vitamin C shortened the duration of colds in adults by 8% and in children by 18%. Vitamin C also decreased the severity of colds.
A systematic review by the Cochrane Collaboration, last updated in 2006, examines sixteen randomized controlled trials studying various echinacea preparations for prevention and treatment of the common cold. Echinacea showed no benefit over placebo for prevention. Evidence for treatment was inconsistent. Reported side effects were rare.
In the twelfth century, Moses Maimonides wrote, "Chicken soup...is recommended as an excellent food as well as medication." Since then, there have been numerous reports in the United States that chicken soup alleviates the symptoms of the common cold. Even usually staid medical journals have published tongue-in-cheek humorous articles on the alleged medicinal properties of chicken soup.
Pelargonium sidoides Extract
A randomized, placebo-controlled study was undertaken to assess the efficacy of a liquid extract of Pelargonium sidoides (EPs) for the treatment of the common cold.  The study included 103 adult patients (18–55 years old) with at least 2 major and 1 minor or with 1 major and 3 minor cold symptoms for 24 to 48 hours. Major cold symptoms included nasal discharge and sore throat; minor symptoms included nasal congestion, sneezing, scratchy throat, hoarseness, cough, headache, muscle aches, and fever.
The primary outcome measure was the Sum of Symptom Intensity Differences (SSID) of the Cold Intensity Score (CIS) from day 1 to day 5. Secondary outcomes included activity level, overall well-being, changes of other cold-related symptoms, ability to work, health-related quality of life, time until onset of treatment effect, treatment outcome, and satisfaction with treatment.
From baseline to day 5, the mean SSID improved by 14.6 points in the EPs group compared with 7.6 points in the placebo group. The mean CIS decreased by 10.4 points and 5.6 points in the EPs and placebo groups, respectively. After 10 days, 78.8% of the EPs group was clinically cured compared with 31.4% in the placebo group. The mean duration of inability to work was significantly lower in the EPs group (6.9 days) compared with the placebo group (8.2 days).
A proprietary extract from the roots of the Pelargonium sidoides plant (EPs 7630) has been the subject of 20 clinical studies on upper respiratory infections involving more than 9,000 patients, including 3,900 children.  It has been shown to safely and effectively treat upper respiratory tract infections including bronchitis,     tonsillopharyngitis in children,  sinusitis, and the common cold. In reviewing the research on Pelargonium sidoides for the common cold, reviewers in the Journal of Family Practice concluded, "In the final analysis, we think that these findings justify recommending this (Pelargonium sidoides) to our patients...Our conclusion is that patients could be advised to purchase the medication to have on hand at home at the start of the cold season...More importantly, this degree of improvement in cold symptoms is dramatically better than other common OTC treatments, including vitamin C, echinacea, and zinc preparations.”
Many people believe that steam inhalation reduces cold symptoms. A 2006 systematic review concludes that "there is insufficient evidence to support the use of steam inhalation as a treatment." There have been reports of children being badly burned when using steam inhalation.
- "A Survival Guide for Preventing and Treating Influenza and the Common Cold". American Lung Association. August 2005. Archived from the original on 2007-01-08. Retrieved 2007-06-11.
- Linde K, Barrett B, Wölkart K, Bauer R, Melchart D (2006). "Echinacea for preventing and treating the common cold". In Linde, Klaus. Cochrane Database of Systematic Reviews (1): CD000530. doi:10.1002/14651858.CD000530.pub2. PMID 16437427.
- Boyce JM, Pittet D (October 2002). "Guideline for Hand Hygiene in Health-Care Settings. Recommendations of the Healthcare Infection Control Practices Advisory Committee and the HICPAC/SHEA/APIC/IDSA Hand Hygiene Task Force. Society for Healthcare Epidemiology of America/Association for Professionals in Infection Control/Infectious Diseases Society of America". MMWR Recomm Rep 51 (RR–16): 1–45, quiz CE1–4. PMID 12418624.
- "Staying healthy is in your hands - Public Health Agency Canada". 17 April 2008. Archived from the original on 6 June 2008. Retrieved 5 May 2008.
- "Common Cold: Treatments and Drugs". Mayo Clinic. Archived from the original on 12 February 2010. Retrieved 9 January 2010.
- Hemilä H (2011) Zinc lozenges may shorten the duration of colds: a systematic review. Open Respir Med J 5:51-8 Refs with links: http://www.mv.helsinki.fi/home/hemila/Zn/TORMJ.htm
- Hemilä H (2006) Do vitamins C and E affect respiratory infections? Thesis, Medical Faculty, University of Helsinki, 2006 [ISBN 952-10-2837-8
- Hemilä H (2009) Vitamins and minerals. In:"Common cold" (Eccles R, Weber O, eds.) Birkhauser Verlag, pp. 275-307
- Hemilä H, Chalker EB (2013) Vitamin C for preventing and treating the common cold. Cochrane Database Syst Rev CD000980 http://dx.doi.org/10.1002/14651858.CD000980.pub4 Refs to the review: http://www.mv.helsinki.fi/home/hemila/CC
- Hemilä H (1997) Vitamin C supplementation and the common cold - was Linus Pauling right or wrong? Int J Vitam Nutr Res 67:329-335
- Shah, SA; Sander, S, White, CM, Rinaldi, M, Coleman, CI (2007 Jul). "Evaluation of echinacea for the prevention and treatment of the common cold: a meta-analysis.". The Lancet infectious diseases 7 (7): 473–80. doi:10.1016/S1473-3099(07)70160-3. PMID 17597571.
- "Common Cold". National Institute of Allergy and Infectious Diseases. 2006-11-27. Archived from the original on 23 June 2007. Retrieved 2007-06-11.
- Simasek M, Blandino DA (2007). "Treatment of the common cold". American Family Physician 75 (4): 515–20. PMID 17323712.
- "Common Cold (Upper Respiratory Infection)". The Merck Manual Online. Merck & Co. November 2005. Retrieved 2007-06-13.
- The Natural Standard Research Collaboration (2006-08-01). "Echinacea (E. angustifolia DC, E. pallida, E. purpurea)". Mayo Foundation for Medical Education and Research. Archived from the original on 16 November 2007. Retrieved 2007-11-03.
- "Echinacea". University of Maryland Medical Center. 2005-09-22. Archived from the original on 15 October 2007. Retrieved 2007-11-03.
- Rosner, F (October 1980). "Therapeutic efficacy of chicken soup". Chest 78 (4): 672–674. doi:10.1378/chest.78.4.672. PMID 7191367.
- Rennard, Barbara O.; Ronald F. Ertl, Gail L. Gossman, Richard A. Robbins, Stephen I. Rennard (October 2000). "Chicken Soup Inhibits Neutrophil Chemotaxis In Vitro". Chest 118 (4): 1150–1157. doi:10.1378/chest.118.4.1150. PMID 11035691.
- Caroline, NL.; H Schwartz (February 1975). "Chicken soup rebound and relapse of pneumonia". Chest 67 (2): 215–216. doi:10.1378/chest.67.2.215. PMID 1090422.
- Ohry, Abraham; Jenni Tsafrir (1999-12-14). "Is chicken soup an essential drug?". Canadian Medical Association Journal 161 (12): 1532–3. PMC 1230870. PMID 10624412.
- Lizogub, VG; Riley DS, Heger M (2007). "Efficacy of a Pelargonium sidoides preparation in patients with the common cold: A randomized, double-blind, placebo-controlled clinical trial". Explore (NY) 3 (6): 573–584. doi:10.1016/j.explore.2007.09.004. PMID 18005909.
- Brown, D (Dec 2009). "Pelargonium sidoides Extract (EPs 7630): Alternative Treatment of Acute Upper Respiratory Tract Infections". Nature Medicine 1 (4): 1–6.
- Agbabiaka, TB; Guo R, Ernst E (May 2008). "Pelargonium sidoides for acute bronchitis: A systematic review and meta-analysis". Phytomedicine 15 (5): 378–385. doi:10.1016/j.phymed.2007.11.023. PMID 18222667.
- Matthys, H; Eisebitt T, Seith B, Heger M (2003). "Efficacy and safety of an extract of Pelagronium sidoides (EPs 7630) in adults with acute bronchitis". Phytomedicine 10 (Suppl 4): 7–17. PMID 12807337.
- Chuchalin, AG; Berman B, Lehmacher W (Nov 2005). "Treatment of acute bronchitis in adults with a Pelargonium sidoides preparation (EPs 7630): a randomized, double-blind, placebo-controlled trial.". Explore (NY) 1 (6): 437–45. doi:10.1016/j.explore.2005.08.009. PMID 16781588.
- Matthys, H; Heger M (Feb 2007). "Treatment of acute bronchitis with a liquid herbal drug preparation from Pelargonium sidoides (EPs 7630): a randomised, double-blind, placebo-controlled, multicentre study.". Curr Med Res Opin 23 (2): 323–31. doi:10.1185/030079906X167318. PMID 17288687.
- Bereznoy, VV; Riley D, Wassmer G, Heger M (Sep-Oct 2003). "Efficacy of extract of Pelargonium sidoides in children with acute non-group A beta-hemolytic streptococcus tonsillopharyngitis: a randomized, double-blind, placebo-controlled trial.". Altern Ther Health Med 9 (5): 68–79. PMID 14526713.
- Bachert, C; Schapowal A, Funk P, Kieser M (Mar 2009). "Treatment of acute rhinosinusitis with the preparation from Pelargonium sidoides EPs 7630: a randomized, double-blind, placebo-controlled trial". Rhinology 47 (1): 51–8. PMID 19382496.
- Timmer, A; Günther J, Rücker G, Motschall E, Antes G, Kern WV. (July 2008). "Pelargonium sidoides extract for acute respiratory tract infections". Cochrane Database of Systematic Reviews (3): CD006323. doi:10.1002/14651858.CD006323.pub2. PMID 18646148.
- Patrick, G; Hickner J (Mar 2008). "This obscure herb works for the common cold". J Fam Pract 57 (3): 157–61. PMC 3183890. PMID 18321451.
- Braun BL, Fowles JB, Solberg L, Kind E, Healey M, Anderson R (2000). "Patient beliefs about the characteristics, causes, and care of the common cold: an update". The Journal of Family Practice 49 (2): 153–6. PMID 10718693.
- Singh M; Singh, Meenu (2006). "Heated, humidified air for the common cold". In Singh, Meenu. Cochrane Database of Systematic Reviews 3: CD001728. doi:10.1002/14651858.CD001728.pub3. PMID 16855975.
- Akhavani MA, Baker RH (2005). "Steam inhalation treatment for children". Br J Gen Pract 55 (516): 557. PMC 1472796. PMID 16004753.