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Monday, January 7, 2013

Common cold in adult



Who has not experienced "common cold" lately?  We refer “cold” as an upper respiratory viral infection involving, nasal congestion and discharge, sneezing, sore throat, cough, low-grade fever, headache, and malaise. The common cold is different than influenza, bacterial pharyngitis, acute bronchitis, acute bacterial sinusitis, and seasonal allergy.

Many of my patients would ask for antibiotics for their common cold.   Unfortunately, antibiotic does not work since common cold is due to viruses.  Over the counter cold medications which contain cough-suppressant, antihistamines, decongestant and mild pain medications are usually helpful – at least to make the suffering more bearable.   Do drink plenty of water to hydrate yourself. 

How about Zinc containing medications?  In the mid 1970s, zinc ions were reported to inhibit rhinovirus replication.   Some studies suggested that Zinc reduced duration of cold symptoms.    Adverse effects, including bad taste and nausea, were common in the zinc group in all reviews.  The FDA has advised against the use of  over-the-counter zinc-containing intranasal products (Zicam) because of multiple reports of permanent anosmia (inability to smell).

How about Vitamin C?  Studies using Vitamin C for common cold are controversial.  The best study was done in persons involved in high intensity physical stress (soldiers in sub-artic exercise) where vitamin C seemed to reduce incidence of cold.  In you and me, it does not seem to make much different.

I recommend the usual motherly advice when you have common cold: plenty of rest and fluid.  Use over the counter medications if you have to.  Also, see your doctors or NP if the symptoms worsen.

Reference:

-Hemilä H. Zinc lozenges may shorten the duration of colds: a systematic review. Open Respir Med J 2011; 5:51.
-Singh M, et al.  Zinc for the common cold.  Cochrane Database Syst Rev 2011
-Arroll B. Non-antibiotic treatments for upper-respiratory tract infections (common cold). Respir Med. 2005;99(12):1477.