Tetracycline Adverse Effects

Critical Contraindications and High-Risk Populations

• The American Academy of Dermatology recommends that tetracyclines should not be used in children under 8 years of age unless other drugs are ineffective or contraindicated, due to the risk of permanent tooth discoloration and enamel hypoplasia 1, 2, 3
• The American Academy of Dermatology states that tetracyclines are contraindicated in pregnancy (Category D) due to the risk of fetal harm, including retardation of skeletal development and embryotoxicity 1, 2, 3

Common Adverse Effects

• The American Academy of Dermatology reports that gastrointestinal adverse effects, such as anorexia, nausea, epigastric distress, vomiting, and diarrhea, are common with tetracycline use 1, 3
• The American Academy of Dermatology notes that photosensitivity (exaggerated sunburn reaction) is a well-recognized adverse effect of tetracyclines, and patients should avoid prolonged sun exposure and use broad-spectrum sunscreens 1, 3, 8

Serious and Life-Threatening Adverse Effects

• The American Academy of Dermatology warns that hypersensitivity reactions, including urticaria, angioneurotic edema, anaphylaxis, and anaphylactoid reactions, can occur with tetracycline use 1, 3
• The Centers for Disease Control and Prevention (CDC) reports that fatal hepatotoxicity has been associated with tetracycline use, particularly in pregnant women receiving high-dose intravenous tetracycline 6

Drug Interactions

• The American Academy of Dermatology advises that antacids (aluminum, calcium, magnesium-containing) can reduce tetracycline absorption, and oral anticoagulants can be potentiated by tetracyclines 1, 3
• The American Academy of Dermatology notes that hormonal contraceptives may be less effective with tetracycline use, and iron-containing preparations can reduce tetracycline absorption 1, 3, 4

Monitoring Recommendations

• The American Academy of Dermatology recommends periodic laboratory evaluation, including complete blood count, renal function, and liver function tests, for patients on long-term tetracycline therapy 7

Clinical Pitfalls to Avoid

• The American Academy of Dermatology advises against using tetracyclines as monotherapy for acne treatment, and against prescribing tetracyclines to children under 8 years of age unless absolutely necessary 1, 2, 3, 4
• The CDC recommends avoiding tetracycline use in pregnancy unless the benefits outweigh the risks, and counseling all patients about photosensitivity before initiating therapy 1, 2, 3, 6, 8