doxycycline vs doxycycline hyclate
Side-by-side comparison of doxycycline and doxycycline hyclate. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
minor Known Drug Interaction
Barbiturates, carbamazepine, and phenytoin decrease the half-life of doxycycline.
Recommendation: Your doctor may need to adjust your treatment plan to make sure the medicine stays at a helpful level in your body.
Vibramycin, Doryx
Doryx MPC
Doxycycline is an antibiotic medicine. It fights bacteria in your body to treat different kinds of infections.
Doxycycline hyclate is an antibiotic that fights bacteria in your body. It can treat many different types of 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.
This medicine can treat infections like Rocky Mountain spotted fever and typhus. It also treats respiratory infections, some STIs, and infections like plague and cholera. Your doctor will test to make sure doxycycline is the right medicine for your infection.
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.
Doxycycline stops bacteria from growing by interfering with how they make proteins. This helps your body fight off the infection. It is a tetracycline antibiotic.
- • Nausea
- • Vomiting
- • Diarrhea
- • Rash
- • Photosensitivity (increased sensitivity to sunlight)
- • Nausea
- • Vomiting
- • Diarrhea
- Feeling sick to your stomach 4,770
- Feeling tired 4,419
- Skin irritation 3,946
- Loose, watery stools 3,844
- Discomfort 3,832
- Feeling sick to your stomach 4,734
- Feeling very tired 4,376
- Skin irritation 3,920
- Loose or watery stools 3,814
- Discomfort 3,793
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.
Doxycycline can cause permanent tooth discoloration if used during tooth development. Tell your doctor if you have kidney problems.
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.
Doxycycline can harm an unborn baby. Talk to your doctor if you are pregnant or plan to become pregnant. It is not known if doxycycline passes into breast milk, so talk to your doctor if you are breastfeeding.
Also Compare, Nearby Drugs
Compare doxycycline with
How to Read This doxycycline vs doxycycline hyclate Comparison
doxycycline is classified in the Tetracycline Antibiotic drug class, while doxycycline hyclate sits within the Tetracycline Antibiotic (Antimalarial) class. Drugs from different classes work through distinct mechanisms, so a head-to-head comparison illustrates trade-offs rather than equivalence. 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 20,811 submissions while doxycycline hyclate has 20,637. Those figures reflect cumulative reporting volume, not per-patient risk, so older, widely dispensed drugs typically look worse on count alone. These two drugs have a known minor interaction flagged in FDA labeling, attributed to certain medications can cause your body to clear doxycycline from your system much faster than usual.. 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 doxycycline hyclate - 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.