Doxycycline vs. Minocycline
See how Doxycycline and Minocycline compare on approved uses, dosing, side effects, and cost.
Key Takeaways
Doxycycline and minocycline are both tetracycline antibiotics used to treat moderate to severe inflammatory acne, usually alongside topical treatments.
Minocycline has an extended-release formulation specifically FDA-approved for acne, while doxycycline's acne use is approved only as adjunctive therapy.
Doxycycline is more likely to cause sun sensitivity, while minocycline carries a higher chance of dizziness and rare autoimmune reactions.
Doxycycline vs. Minocycline Drug Summary
Doxycycline
Doxycycline is a tetracycline-class antibiotic used to treat a wide range of bacterial infections, from respiratory infections to sexually transmitted diseases, and as adjunctive therapy for severe acne. It comes as an oral capsule, tablet, or liquid, and is typically taken once or twice daily with a full glass of water.
Minocycline
Minocycline is a tetracycline-class antibiotic used for infections such as Rocky Mountain spotted fever and respiratory infections, and its extended-release form is FDA-approved specifically for inflammatory acne in people 12 and older. It is taken orally, often once or twice daily, with acne dosing based on body weight.
Doxycycline vs. Minocycline Side Effects
Doxycycline
Minocycline
Doxycycline vs. Minocycline Dosage
Doxycycline
Minocycline
| STAGE | DOSE | WHEN |
| Starting dose | 200 mg total | Day 1 |
| Maximum dose | 100 mg every 12 hours | If needed |
| Dose changes | 2 increases | Every day |
| STAGE | DOSE | WHEN |
| Starting dose | 200 mg single dose | Day 1 |
| Maximum dose | 50 mg twice daily | If needed |
| Dose changes | 3 increases | As tolerated |
Doxycycline
| STAGE | DOSE | WHEN |
| Starting dose | 200 mg total | Day 1 |
| Maximum dose | 100 mg every 12 hours | If needed |
| Dose changes | 2 increases | Every day |
Minocycline
| STAGE | DOSE | WHEN |
| Starting dose | 200 mg single dose | Day 1 |
| Maximum dose | 50 mg twice daily | If needed |
| Dose changes | 3 increases | As tolerated |
Doxycycline vs. Minocycline Indications
Doxycycline
Doxycycline treats a wide range of bacterial infections, including sexually transmitted infections, respiratory infections, and rickettsial diseases like Rocky Mountain spotted fever. It is also FDA-approved as adjunctive therapy for severe acne and is used off-label for Lyme disease and MRSA skin infections.
Rocky Mountain spotted fever and other rickettsial infections
Chlamydia and uncomplicated gonorrhea
Adjunctive therapy for severe acne
Anthrax post-exposure prophylaxis
Lyme disease prophylaxis (off-label use)
Minocycline
Minocycline treats infections such as Rocky Mountain spotted fever, Mycoplasma pneumoniae respiratory infections, and syphilis in penicillin-allergic patients. Its extended-release form is specifically FDA-approved for inflammatory, non-nodular moderate to severe acne in people 12 and older.
Rocky Mountain spotted fever and typhus infections
Respiratory infections from Mycoplasma pneumoniae
Inflammatory acne (extended-release form only)
Syphilis in penicillin-allergic patients
Rheumatoid arthritis adjunct therapy (off-label use)
Doxycycline vs. Minocycline Pros and Cons
Doxycycline
Doxycycline is one of the oldest and most widely prescribed tetracyclines, with decades of use behind it. It covers a broader range of approved infections than minocycline, though its acne use is classified as adjunctive rather than a dedicated formulation.
Pros
Approved for a wider range of bacterial infections, including STIs
Long-standing safety record since FDA approval in 1967
Lower reported rates of dizziness and headache
Also approved for malaria prevention and anthrax exposure
Cons
Higher risk of photosensitivity and sunburn with sun exposure
Can cause esophageal irritation if not taken with enough water
Acne use is adjunctive only, not a dedicated FDA-approved formulation
More frequent GI side effects like nausea and vomiting
Minocycline
Minocycline stands out for having an extended-release formulation built specifically for inflammatory acne, dosed by body weight. Its near-complete oral absorption means less diarrhea than some other tetracyclines, though it carries its own risks around dizziness and rare immune reactions.
Pros
FDA-approved extended-release formulation made specifically for acne
Less GI diarrhea due to more complete oral absorption
Weight-based, once-daily dosing option for acne treatment
Effective alternative for syphilis in penicillin-allergic patients
Cons
Higher risk of dizziness, fatigue, and headache
Carries risk of drug-induced lupus and other autoimmune reactions
Hepatotoxicity risk noted in labeling
Extended-release form not approved for non-inflammatory acne lesions
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