According to MayoClinic.com, tetracyclines are a group of broad-spectrum antibiotics which are produced by Streptomyces bacterium. Tetracycline is used to treat different bacterial infections and to help control acne. Tetracycline is available only by prescription. According to Drugs.com, tetracycline acts by slowing the growth of sensitive bacteria by interfering with the production of the proteins needed by the bacteria to grow. Some of the side effects of tetracycline are teeth discoloration, difficult swallowing, black hairy tongue and skin reactions to sunlight.
Teeth Discoloration
According to MayoClinic.com, using tetracycline can result in teeth discoloration. Tetracyclines have a tendency to bind to the connective tissues in the developing bones and teeth. The Mayo Clinic recommends use of tetracycline only for children above 8 years of age.
Difficulty Swallowing
Difficulty swallowing can result from tetracycline use. According to MayoClinic.com, tetracycline use can damage the lining of the esophagus to cause erosion or deeper ulcers. This damage results in difficult swallowing. Damage by tetracycline is more likely to occur among older people. The reason behind damage in older people can be abnormal contraction of the esophagus or that older people tend to not drink enough water during drug intake.
Black Hairy Tongue
According to Drugs.com, black hairy tongue is associated with tetracycline usage. Tetracycline use can result in an imbalance in the normal flora of the tongue. This causes overgrowth of bacteria and fungi on the threadlike papillae of tongue and makes the tongue look hairy. Black hairy tongue is a temporary and harmless oral condition that should eventually disappear once the drug is stopped.
Skin Reactions to Sunlight
According to MayoClinic.com, tetracycline use can make the skin more sensitive toward sunlight, also known as photosensitivity. MayoClinic.com recommends such patients to wear sunscreen lotions, protective clothes and avoid direct exposure to sunlight.
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