doxycycline vs omadacycline
Side-by-side comparison of doxycycline and omadacycline Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
Vibramycin, Doryx
Nuzyra
Doxycycline is an antibiotic medicine. It fights bacteria in your body to treat different kinds of infections.
Nuzyra is an antibiotic medicine. It fights certain bacteria to treat infections.
Doxycycline treats many types of infections caused by bacteria. This includes infections like Rocky Mountain spotted fever, typhus, Q fever, and certain respiratory infections. It also treats sexually transmitted infections like gonorrhea and chlamydia, as well as other infections like plague and tularemia.
Nuzyra treats community-acquired bacterial pneumonia (CABP), a lung infection. It also treats acute bacterial skin and skin structure infections (ABSSSI). Use Nuzyra only to treat infections proven or strongly suspected to be caused by bacteria. This helps reduce drug-resistant bacteria.
Doxycycline belongs to a class of drugs called tetracycline antibiotics. It works by stopping the growth of bacteria. This helps your body fight off the infection.
Nuzyra is a tetracycline antibiotic. It stops bacteria from growing by interfering with their protein production. This helps your body fight off the infection.
- • Nausea
- • Vomiting
- • Diarrhea
- • Rash
- • Photosensitivity (increased sensitivity to sunlight)
- • Nausea
- • Vomiting
- • Reactions where the IV was given
- • Increased liver enzyme levels
- • High blood pressure
- The medicine is not working 5,030
- Feeling sick to your stomach 4,770
- Using the medicine for something it's not approved for 4,436
- Feeling tired 4,419
- Skin irritation 3,946
- Off Label Use 405
- Nausea 245
- Vomiting 152
- Drug Ineffective 113
- Diarrhoea 107
Doxycycline can cause permanent tooth discoloration if used during tooth development (pregnancy, infancy, childhood up to 8 years old). It can also cause increased pressure inside the skull. Tell your doctor right away if you have blurred vision, double vision, or a severe headache.
Nuzyra may cause an imbalance in the number of deaths in patients with pneumonia. The cause of this is not known, so your doctor will watch you closely. Nuzyra can also cause tooth discoloration and affect bone growth in children under 8 and unborn babies. Diarrhea can occur, so tell your doctor if you have diarrhea while taking Nuzyra.
Doxycycline can harm an unborn baby. Do not use this medicine if you are pregnant. Doxycycline can pass into breast milk and may affect bone and tooth development in the nursing infant. Talk to your doctor about the best way to feed your baby if you are taking this medicine.
Nuzyra can cause tooth discoloration and bone problems in unborn babies. Breastfeeding is not recommended while using Nuzyra.
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How to Read This doxycycline vs omadacycline Comparison
doxycycline is classified in the Tetracycline Antibiotic drug class, while omadacycline sits within the Tetracycline Antibiotic class. Because both drugs share the same classification, they are often considered interchangeable in theory — but clinical outcomes rarely track that cleanly. Both drugs are prescription-only, so a licensed provider must authorize use.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, doxycycline has 22,601 submissions while omadacycline has 1,022. Those figures reflect cumulative reporting volume — not per-patient risk — so older, widely dispensed drugs typically look worse on count alone. No direct interaction between these two drugs is listed in our FDA-derived dataset, though co-prescription still warrants pharmacist review. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot substitute for clinical judgment. Effectiveness, tolerability, drug-drug interactions with your other medications, kidney and liver function, pregnancy status, insurance formulary, and price all feed into a decision that only a licensed prescriber can make responsibly. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This page is for educational purposes only, is not medical advice, and should not be used to self-switch between doxycycline and omadacycline — always consult your physician or pharmacist first.
Important: This comparison is for informational purposes only. Drug effects vary between individuals. Always consult your doctor or pharmacist for personalized medical advice.