Doxycycline Hyclate 100mg
Generic For: Vibramycin
Doxycycline hyclate 100mg (brand name Vibramycin) is a tetracycline-class antibiotic prescribed for a wide range of bacterial infections, including respiratory infections, acne, and certain sexually transmitted infections. It works by stopping the growth of susceptible bacteria. After a licensed provider reviews your prescription, your order ships from a licensed U.S. pharmacy.
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Buy Doxycycline Hyclate 100mg Capsules Online
Doxycycline hyclate is a tetracycline antibiotic used for bacterial infections, acne, and chlamydia.
Doxycycline Hyclate 100mg Quick Facts
| Drug class | Tetracycline antibiotic |
|---|---|
| Treats | Bacterial infections, acne, chlamydia, respiratory infections |
| Form | Capsule |
| Typical dosing | Take 1 capsule by mouth twice daily for 7 days. |
| Prescription required | Yes — prescription only |
What Is Doxycycline Hyclate 100mg?
Doxycycline hyclate is a prescription antibiotic in the tetracycline class, sold under the brand name Vibramycin and as a generic. It treats infections caused by susceptible bacteria by preventing them from making the proteins they need to grow. Doxycycline hyclate is commonly prescribed for respiratory tract infections, skin conditions such as acne, tick-borne illnesses, and certain sexually transmitted infections. It is taken by mouth, usually once or twice daily, and only works against bacterial infections — not viral illnesses like colds or the flu.
What Does Doxycycline Hyclate 100mg Treat?
Respiratory tract infections
Acne (adjunctive therapy)
Chlamydia and other sexually transmitted infections
Skin and soft tissue infections
Rocky Mountain spotted fever and other rickettsial infections
Urinary tract infections
Malaria prophylaxis
Doxycycline Hyclate 100mg Dosage
Adults: 100 mg by mouth every 12 hours on day 1, then 100 mg once daily (or 50 mg every 12 hours).
Severe infections: 100 mg by mouth every 12 hours.
Uncomplicated chlamydia: 100 mg by mouth twice daily for 7 days.
Your prescriber will determine the dose and duration that are right for you. Always follow the directions on your prescription label.
Doxycycline Hyclate 100mg Side Effects
Common side effects
- Nausea
- Vomiting
- Diarrhea
- Loss of appetite
- Sensitivity to sunlight (photosensitivity)
- Headache
- Rash
Serious side effects
Stop taking this medication and seek medical attention right away if you experience:
- Severe or persistent diarrhea (possible C. difficile infection)
- Difficulty or pain when swallowing; esophageal irritation or ulcers
- Severe skin reactions or blistering rash
- Signs of allergic reaction (swelling of face or throat, trouble breathing)
- Severe headache or vision changes (possible intracranial hypertension)
Warnings & Interactions
Do not use if allergic to tetracycline antibiotics.
Not recommended during pregnancy or in children under 8 (may cause permanent tooth discoloration and affect bone growth).
Avoid excessive sun exposure; use sunscreen due to photosensitivity risk.
Take with a full glass of water and remain upright for at least 30 minutes to reduce esophageal irritation.
Antacids, calcium, iron, and dairy products can reduce absorption — separate doses by 2-3 hours.
May decrease the effectiveness of oral contraceptives; consider backup contraception.
May increase the effects of blood thinners such as warfarin.
Tell your prescriber about all medications, supplements, and health conditions before starting doxycycline hyclate 100mg.
Sources & References
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