Doxycycline — Tetracycline antibiotic. Study the mechanism, listed uses and warnings from the US label on one sourced card.
Generic name
Doxycycline
Class
Tetracycline antibiotic
Mechanism
Binds the 30S ribosomal subunit and inhibits bacterial protein synthesis; bacteriostatic against Gram-positive and Gram-negative bacteria.
Used for
Specified rickettsial infections, including Rocky Mountain spotted fever; Respiratory infection caused by Mycoplasma pneumoniae; The specified susceptible chlamydial infections, including lymphogranuloma venereum, trachoma, inclusion conjunctivitis and uncomplicated urethral, endocervical or rectal infection in adults
Hypersensitivity to tetracyclines; Tooth discoloration during tooth development; young-child use requires weighing benefits in severe or life-threatening infections; C. difficile-associated diarrhea; Serious skin reactions and intracranial hypertension
Interactions
Anticoagulants; Penicillin; Antacids (Al, Ca, Mg) and iron
Brand questions use only name pairings verified against the linked product source. Unverified pairings are withheld from these questions; the other study content remains available.
Label date: 20260720 · For learning, not clinical decisions. US label and brand information; always consult the current source.
Source snapshot checked: 2026-10-21. The source document and selected fields were compared. The complete card has not had an independent clinical review.
Mechanism: Interferes with bacterial cell-wall formation, killing susceptible organisms while they are actively multiplying.
On both cards: Common side effects — Nausea; Vomiting; Diarrhea · Warnings — C. difficile-associated diarrhea
Only on the Amoxicillin card: Used for — Ear, nose and throat infections caused by the specified susceptible beta-lactamase-negative bacteria; Genitourinary infections caused by the specified susceptible beta-lactamase-negative bacteria; Skin and skin-structure infections caused by the specified susceptible beta-lactamase-negative bacteria; Lower respiratory infections caused by the specified susceptible beta-lactamase-negative bacteria · Common side effects — Rash · Warnings — Anaphylactic reactions; Severe cutaneous adverse reactions · Interactions — Probenecid; Oral anticoagulants; Allopurinol
Mechanism: Disrupts bacterial cell-wall synthesis, producing a bactericidal effect against susceptible organisms.
On both cards: Common side effects — Nausea; Vomiting; Diarrhea · Warnings — C. difficile-associated diarrhea
Only on the Cephalexin card: Used for — Respiratory infections caused by the specified susceptible bacteria; Otitis media caused by the specified susceptible bacteria; Skin and skin-structure infections caused by the specified susceptible bacteria; Bone or genitourinary infections caused by the specified susceptible bacteria · Common side effects — Dyspepsia; Abdominal pain · Warnings — Serious hypersensitivity (anaphylactic) reactions; Seizure potential · Interactions — Metformin; Probenecid
Mechanism: Inhibits bacterial DNA gyrase (topoisomerase II) and topoisomerase IV, disrupting processes required for bacterial DNA replication and maintenance.
On both cards: Common side effects — Nausea; Vomiting; Diarrhea · Warnings — C. difficile-associated diarrhea
Only on the Ciprofloxacin card: Used for — UTIs due to specified susceptible bacteria in adults, and selected complicated UTI/pyelonephritis in children aged 1–17; acute uncomplicated cystitis use is reserved for patients without alternatives; Specified susceptible lower-respiratory infections in adults; acute chronic-bronchitis exacerbation use is reserved for patients without alternatives; Specified susceptible skin, bone and joint infections in adults; Post-exposure inhalational anthrax and source-specified plague treatment/prevention in adults and children · Common side effects — Abnormal liver function tests; Rash · Warnings — QT prolongation; Hepatotoxicity · Interactions — Tizanidine (contraindicated); Theophylline; Other CYP1A2 substrates
An item counts as shared only when both cards use the same wording. If a card does not list an item, that is not a statement that the effect never occurs.
Capsera