Mymox (Amoxicillin Trihydrate)

Amoxicillin is a penicillin‑type antibiotic that targets bacterial infections of the respiratory, urinary and integumentary systems.

• Otitis media: reduces bacterial load and alleviates ear pain and fever.
• Sinusitis: clears sinus inflammation caused by susceptible bacteria.
• Community‑acquired pneumonia: combats lung infection and improves breathing.
• Urinary tract infection: eradicates common uropathogens and relieves dysuria.
• Skin and soft tissue infections: treats cellulitis and wound infections caused by susceptible organisms.

• Amoxicillin inhibits bacterial cell wall synthesis by binding to penicillin‑binding proteins, which prevents the cross‑linking of peptidoglycan strands. This disruption weakens the cell wall, leading to osmotic instability and bacterial lysis, particularly in actively dividing, susceptible Gram‑positive and some Gram‑negative organisms.

Amoxicillin may cause a range of adverse reactions, from mild to severe.

Common Side Effects

• Diarrhea: mild to moderate loose stools.
• Nausea: occasional feeling of stomach upset.
• Rash: transient skin redness or itching.
• Headache: mild tension‑type headache.
• Vaginal candidiasis: yeast overgrowth in some women.

Serious or Rare Side Effects

• Anaphylaxis: severe allergic reaction with airway compromise.
• Stevens‑Johnson syndrome: rare skin blistering disorder.
• Hemolytic anemia: destruction of red blood cells.
• Clostridioides difficile colitis: severe intestinal infection.
• Liver enzyme elevation: abnormal liver function tests.

Before prescribing amoxicillin, consider patient‑specific factors and safety measures.

• Allergy assessment: avoid if known penicillin hypersensitivity.
• Renal function: adjust dose in severe impairment.
• Hepatic disease: monitor liver enzymes during prolonged therapy.
• Concomitant oral contraceptives: counsel that efficacy may be reduced.
• Pregnancy and lactation: evaluate risk‑benefit; use only if clearly needed.
• Store at ambient temperature: keep below 25°C in original container, protect from moisture and direct sunlight.

Amoxicillin can interact with several medicines, altering efficacy or safety.

Major Interactions (Avoid)

• Methotrexate: increased toxicity due to reduced renal clearance.
• Warfarin: enhanced anticoagulant effect, monitor INR closely.
• Probenecid: decreased renal excretion, leading to higher amoxicillin levels.

Moderate Interactions (Monitor Closely)

• Oral contraceptives: possible reduction in effectiveness, advise backup method.
• Allopurinol: may increase risk of rash.
• Antacids containing aluminum or magnesium: may delay absorption, separate dosing by at least 2 hours.