{"id":4745,"date":"2026-07-31T07:16:59","date_gmt":"2026-07-31T07:16:59","guid":{"rendered":"https:\/\/peptoscience.com\/?post_type=product&p=4745"},"modified":"2026-07-31T07:17:06","modified_gmt":"2026-07-31T07:17:06","slug":"doxycycline-100mg","status":"publish","type":"product","link":"https:\/\/peptoscience.com\/de\/product\/doxycycline-100mg\/","title":{"rendered":"Doxycycline 100mg"},"content":{"rendered":"

Doxycycline 100mg<\/a><\/h1>\n
\n

Doxycycline<\/a> 100mg is a broad-spectrum tetracycline antibiotic<\/strong>\u00a0used 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:<\/p>\n

Common Uses<\/strong><\/h4>\n
    \n
  • Infections<\/strong>: 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).<\/li>\n
  • Other indications<\/strong>:\n
      \n
    • Lyme disease (early stage).<\/li>\n
    • Malaria prevention or treatment (often in combination).<\/li>\n
    • Rickettsial infections (e.g., Rocky Mountain spotted fever).<\/li>\n
    • Anthrax exposure (post-exposure prophylaxis).<\/li>\n<\/ul>\n<\/li>\n
    • Off-label<\/strong>: Sometimes for periodontal disease or inflammatory conditions like rosacea.<\/li>\n<\/ul>\n

      Standard Dosing (Adults, unless specified)<\/strong><\/h4>\n<\/div>\n
      \n\n\n\n\n\n\n\n\n\n
      Condition<\/th>\nTypical Dose<\/th>\nFrequency<\/th>\nDuration<\/th>\nNotes<\/th>\n<\/tr>\n<\/thead>\n
      Most infections<\/td>\n100mg<\/td>\nTwice daily (every 12 hours)<\/td>\n7\u201314 days<\/td>\nTake with food\/water to reduce stomach upset.<\/td>\n<\/tr>\n
      Acne\/Rosacea<\/td>\n40\u2013100mg<\/td>\nOnce or twice daily<\/td>\n6\u201312 weeks<\/td>\nLower doses for long-term skin use.<\/td>\n<\/tr>\n
      Malaria prophylaxis<\/td>\n100mg<\/td>\nOnce daily<\/td>\nStart 1\u20132 days before travel, continue 4 weeks after<\/td>\nNot for pregnant women.<\/td>\n<\/tr>\n
      Chlamydia<\/td>\n100mg<\/td>\nTwice daily (day 1), then 100mg once daily<\/td>\n7 days<\/td>\nSingle 100mg dose sometimes used for uncomplicated cases.<\/td>\n<\/tr>\n
      Children (>8 years, >45kg)<\/td>\n100mg (or 4.4mg\/kg)<\/td>\nTwice daily<\/td>\nVaries<\/td>\nAvoid in kids <8 years due to tooth staining risk.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
      \n
        \n
      • Adjustments<\/strong>: Lower doses for kidney\/liver impairment, elderly, or obesity. Always follow prescriber instructions.<\/li>\n
      • Evidence<\/strong>: Supported by clinical trials (e.g., NEJM studies on Lyme disease efficacy >90% with 100mg BID).<\/li>\n<\/ul>\n

        How It Works<\/strong><\/h4>\n

        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\u201322 hours) allowing once\/twice-daily dosing.<\/p>\n

        Side Effects<\/strong><\/h4>\n<\/div>\n
        \n\n\n\n\n\n\n\n\n
        Common (>10%)<\/th>\nSerious (Seek Immediate Help)<\/th>\n<\/tr>\n<\/thead>\n
        Nausea, vomiting, diarrhea<\/td>\nSevere allergic reaction (rash, swelling, anaphylaxis)<\/td>\n<\/tr>\n
        Sun sensitivity (photosensitivity rash)<\/td>\nIntracranial hypertension (headache, vision changes)<\/td>\n<\/tr>\n
        Esophageal irritation (if not taken with water)<\/td>\nClostridium difficile diarrhea (bloody stools)<\/td>\n<\/tr>\n
        Tooth discoloration (long-term use)<\/td>\nLiver toxicity (jaundice, dark urine)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
        \n
          \n
        • Interactions<\/strong>: Avoid antacids, dairy, iron supplements (reduce absorption\u2014space 2\u20133 hours apart). Increases warfarin\/digoxin effects. Not with isotretinoin (risk of pseudotumor cerebri).<\/li>\n
        • Contraindications<\/strong>: Pregnancy (category D\u2014fetal bone\/teeth damage), breastfeeding, children <8 years.<\/li>\n<\/ul>\n

          Administration Tips<\/strong><\/h4>\n
            \n
          • Take upright with a full glass of water.<\/li>\n
          • Protect from sun (use SPF 30+).<\/li>\n
          • Complete full course to prevent resistance.<\/li>\n
          • Storage: Room temp, away from moisture\/light.<\/li>\n<\/ul>\n

            Important<\/strong>: This is general information from reliable sources (e.g., FDA label, UpToDate, Lexicomp).\u00a0Doxycycline requires a prescription<\/strong>\u2014do not self-medicate. Consult a doctor or pharmacist for personalized advice, especially if you have allergies, other meds, or conditions.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

            Doxycycline 100mg Doxycycline 100mg is a broad-spectrum tetracycline antibiotic\u00a0used to treat a variety of bacterial infections. 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