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Dr. Henry Oshea, MD
2605 Heather Sees Way
Tulsa, OK 74120
918-764-1256

Authoritative Sources

What Is Amoxicillin?

A widely used prescription antibiotic in the penicillin family

Amoxicillin (brand names include Amoxil, Trimox, and Moxatag) is an aminopenicillin antibiotic active against a wide range of gram-positive and gram-negative bacteria. It works by interfering with bacterial cell wall synthesis, causing the bacteria to break down and die.

First approved by the U.S. Food and Drug Administration in 1974, amoxicillin remains one of the most commonly prescribed antibiotics in the United States. It is available in several oral forms: capsules, chewable tablets, and liquid suspension. Generic amoxicillin is widely available and therapeutically equivalent to brand-name formulations.

Common infections treated with amoxicillin include:

  • Strep throat (Group A Streptococcus)
  • Ear infections (acute otitis media)
  • Sinusitis and upper respiratory tract infections
  • Urinary tract infections (UTIs)
  • Skin and soft tissue infections
  • H. pylori eradication (in combination therapy)

Important: Amoxicillin is a prescription medication in the United States. It is not available over the counter at retail pharmacies. A licensed prescriber must evaluate your symptoms and issue a valid prescription before amoxicillin can be dispensed.

Dosage Options

Standard adult dosing forms and strengths

Amoxicillin is dispensed in several strengths to accommodate different infection types and patient needs. The prescribing physician determines the appropriate dose based on the diagnosis, severity, and patient weight or renal function.

Strength Form Typical Adult Dose Duration
250 mg Capsule / tablet 250 mg every 8 hours 7–10 days
500 mg Capsule / tablet 500 mg every 8–12 hours 7–10 days
875 mg Tablet 875 mg every 12 hours 7–10 days

Pediatric dosing is weight-based and typically delivered as an oral suspension. Your prescriber will calculate the correct dose. The above information is for general reference only and should not replace your physician's specific instructions.

For detailed prescribing information, see the DailyMed listing on the NIH National Library of Medicine.

Usage & Instructions

How to take amoxicillin correctly

Amoxicillin may be taken with or without food. Take doses at evenly spaced intervals throughout the day to maintain a consistent level of the drug in your system. Complete the full prescribed course even if symptoms improve before the medication is finished — stopping early can allow bacteria to survive and develop resistance.

  • Swallow capsules and tablets whole with a full glass of water
  • Shake oral suspension well before each dose; refrigerate after mixing
  • Do not double up on a missed dose — skip it and continue your regular schedule
  • Store capsules and tablets at room temperature, away from moisture and heat
  • Discard any unused oral suspension after 14 days

If you experience severe stomach pain, persistent diarrhea, skin rash, or difficulty breathing, contact your healthcare provider or seek emergency care immediately.

Safety Information

Contraindications, interactions, and side effects

Contraindications: Do not take amoxicillin if you have a known allergy to penicillin or cephalosporin antibiotics. Inform your prescriber of all current medications, supplements, and medical conditions before starting treatment.

Common side effects include nausea, diarrhea, and stomach upset. These typically resolve as the body adjusts to the medication. Serious side effects requiring immediate medical attention include:

  • Severe allergic reaction (anaphylaxis): hives, swelling, difficulty breathing
  • Severe diarrhea or bloody stools (may indicate C. difficile)
  • Liver problems: jaundice, dark urine, severe fatigue
  • Severe skin reactions: blistering, peeling, or widespread rash

Drug interactions: Amoxicillin may interact with blood thinners (warfarin), methotrexate, probenecid, and certain other antibiotics. Always disclose your full medication list to your prescribing provider.

For comprehensive safety data, consult MedlinePlus (U.S. National Library of Medicine) or the prescribing information provided with your dispensed medication.

Antibiotic Stewardship: The CDC recommends that antibiotics be used only when prescribed by a licensed clinician for a confirmed or strongly suspected bacterial infection. Inappropriate use contributes to antibiotic resistance.

Ordering Details

How to request amoxicillin through a telehealth provider

Patients seeking to obtain generic amoxicillin online may do so through a licensed telehealth consultation. A U.S.-licensed physician will review your symptoms, medical history, and eligibility before issuing a prescription, which is then sent to a pharmacy of your choosing.

How the process works:

  • Complete a health questionnaire describing your current symptoms
  • A licensed physician reviews your information and may follow up with questions
  • If a prescription is appropriate, it is sent electronically to your designated pharmacy
  • Pick up at a local pharmacy or request mail delivery where available

To begin or to ask questions about the process, visit our Contact page. Our medical team reviews inquiries during regular business hours.

Shipping and availability may vary. A consultation fee may apply. This service is available to U.S. residents only. AmoxilCompPharm does not dispense medications directly; prescriptions are fulfilled by licensed pharmacies.