Doxycycline 100mg is a broad-spectrum tetracycline antibiotic used to treat a variety of bacterial infections. The 100mg dose is one of the most common strengths (available as capsules, tablets, or oral suspension). Here’s a concise breakdown based on established medical guidelines from sources like the FDA, CDC, and WHO:

Usos comunes

• Infections: Respiratory tract infections (e.g., pneumonia, bronchitis), urinary tract infections (UTIs), skin infections (e.g., acne, rosacea), eye infections, and sexually transmitted infections (e.g., chlamydia, gonorrhea).
• Otras indicaciones:
  • Lyme disease (early stage).
  • Malaria prevention or treatment (often in combination).
  • Rickettsial infections (e.g., Rocky Mountain spotted fever).
  • Anthrax exposure (post-exposure prophylaxis).
• Uso no autorizado: Sometimes for periodontal disease or inflammatory conditions like rosacea.

Standard Dosing (Adults, unless specified)

• Ajustes: Lower doses for kidney/liver impairment, elderly, or obesity. Always follow prescriber instructions.
• Evidencia: Supported by clinical trials (e.g., NEJM studies on Lyme disease efficacy >90% with 100mg BID).

Cómo Funciona

Doxycycline inhibits bacterial protein synthesis by binding to the 30S ribosomal subunit, effective against gram-positive/negative bacteria, atypicals (e.g., Chlamydia), and some parasites. It’s highly bioavailable (>90% absorption), with a long half-life (16–22 hours) allowing once/twice-daily dosing.

Efectos secundarios

• Interacciones: Avoid antacids, dairy, iron supplements (reduce absorption—space 2–3 hours apart). Increases warfarin/digoxin effects. Not with isotretinoin (risk of pseudotumor cerebri).
• Contraindicaciones: Pregnancy (category D—fetal bone/teeth damage), breastfeeding, children <8 years.

Administration Tips

• Take upright with a full glass of water.
• Protect from sun (use SPF 30+).
• Complete full course to prevent resistance.
• Storage: Room temp, away from moisture/light.

Importante: This is general information from reliable sources (e.g., FDA label, UpToDate, Lexicomp). Doxycycline requires a prescription—do not self-medicate. Consult a doctor or pharmacist for personalized advice, especially if you have allergies, other meds, or conditions.