Tetracycline Class Antibiotics for Acne Treatment

Mechanism of Action and Clinical Recommendations

The American Academy of Dermatology recommends tetracycline class antibiotics, such as doxycycline and minocycline, as first-line therapy for moderate to severe acne, except when contraindicated 1, 2
Doxycycline and minocycline work by inhibiting protein synthesis by binding the 30S subunit of the bacterial ribosome, and have notable anti-inflammatory effects, including inhibiting chemotaxis and metalloproteinase activity 1
The American Academy of Dermatology gives a stronger recommendation for doxycycline compared to minocycline for acne treatment, based on moderate certainty evidence 3, 4

Photosensitivity is more common with doxycycline than minocycline 1, 5
Doxycycline is more frequently associated with gastrointestinal disturbances 1, 3
Minocycline has been associated with more serious adverse events, including tinnitus, dizziness, vertigo, and pigment deposition of the skin, mucous membranes, and teeth 1, 5, 3
Both antibiotics are contraindicated in children under 8 years of age and during pregnancy 6

Both antibiotics should be used with caution and limited to 3-4 months of treatment to minimize bacterial resistance 3, 6
The Centers for Disease Control and Prevention recommends antibiotic stewardship when prescribing these medications 3, 6
Both should be used in combination with topical therapy for optimal results and to reduce antibiotic resistance 2

Minocycline has been associated with black discoloration of breast milk due to iron pigment deposition in macrophages, as noted by the Centers for Disease Control and Prevention in the MMWR Recommendations and Reports 7