What is the appropriate dosage and treatment duration of doxycycline (tetracycline antibiotic) for an adult patient with normal renal function and no known allergies to tetracyclines, presenting with both urinary tract infection (UTI) and pneumonia?

Medical Advisory BoardAll articles are reviewed for accuracy by our Medical Advisory Board

Educational purpose only • Exercise caution as content is pending human review

Article Review Status

Submitted

Under Review

Approved

Last updated: January 11, 2026 • View editorial policy

Personalize

Help us tailor your experience

Which best describes you? Your choice helps us use language that's most understandable for you.

Related Questions

What is the recommended doxycycline (antibiotic) course for a urinary tract infection (UTI)?

What are the next steps for a 35-year-old female patient who developed a rash after taking Doxycycline (an antibiotic) for a urinary tract infection (UTI), which was initially treated with Macrobid (Nitrofurantoin), and the rash has persisted for 10 days, 7 days after stopping the Doxycycline?

How should I treat a 31-year-old woman with persistent urinary tract infection symptoms after 7 days of ceftriaxone, with a urine culture growing Escherichia coli?

What is the best management approach for a 27-year-old pregnant patient (G2P1), at 30.6 weeks gestational age, with recurrent urinary tract infections (UTIs) and right pelvocaliectasis, who has already completed courses of cephalexin (Cefalexin) and nitrofurantoin?

Do we treat a urinary tract infection with 10,000 to 49,000 colony-forming units (CFU) of Escherichia coli per milliliter (mL)?

In patients with mild cognitive impairment, what is the most frequent initial symptom, apathy or depression?

What is the best course of treatment for a patient presenting with mouth sores, considering potential causes such as herpes simplex virus or fungal infections?

Should a patient taking 150 mg of Effexor (venlafaxine) extended release, 300 mg of bupropion, and 7.5 mg of mirtazapine, and experiencing insomnia, decreased sleep quality, anorgasmia, and sexual dysfunction, discontinue venlafaxine?

What dietary recommendations are suggested for patients undergoing egg retrieval, particularly regarding the consumption of organ meats?

How to manage coexisting depression and apathy in a geriatric patient with mild cognitive impairment?

Is Augmentin (amoxicillin-clavulanate) effective for treating pneumonia in a patient with a positive Methicillin-resistant Staphylococcus aureus (MRSA) nasal swab?

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

Have a follow-up question?

Our Medical A.I. is used by practicing medical doctors at top research institutions around the world. Ask any follow up question and get world-class guideline-backed answers instantly.