User Reviews for Doxycycline to treat Upper Respiratory Tract Infection. Also known as: Acticlate, Adoxa, Alodox, Avidoxy, Doryx, Mondoxyne NL, Monodox, Morgidox. Infections caused by anaerobic bacteria are common, and may be serious and life-threatening. Anaerobes predominant in the bacterial flora of normal human skin and mucous membranes, and are a common cause of bacterial infections of endogenous origin. Compare prices and print coupons for Azithromycin (Generic Zithromax) and other Skin Infection, Ear Infection, Bacterial Infection, Lower Respiratory Infection, Pneumonia, Upper Respiratory Infection, and Sinus Infection drugs at CVS, Walgreens, and other pharmacies. Prices start at $10.49 I was prescribed a five-day course of Z-pak after developing a severe flu-like upper respiratory infection. I had an infusion of Rituxan, and all of these symptoms began the next day. Upper respiratory tract infection (URI) represents the most common acute illness evaluated in the outpatient setting. URIs range from the common cold—typically a mild, self-limited, catarrhal syndrome of the nasopharynx—to life-threatening illnesses such as epiglottitis. Contraindications. Do not treat newborn babies as well as children with dysfunction of kidneys or a liver with Azithromycin. Certain kinds of Azithromycin are not allowed for use by patients under sixteen years. Azithromycin for sinus infection treatment. Sinusitis is the most common complication associated with acute infections of the upper respiratory tract. Drugs Used to Treat Upper Respiratory Tract Infection. The following list of medications are in some way related to, or used in the treatment of this condition. Azithromycin oral tablet is available as both a generic and brand-name drug. Brand name: Zithromax. Azithromycin comes as a tablet, suspension, and extended-release suspension you take by mouth. Azithromycin is an antibiotic that fights bacteria. Azithromycin is used to treat many different types of infections caused by bacteria, such as respiratory infections, skin infections, ear infections, and sexually transmitted diseases. Azithromycin may also be used for purposes not listed in this.