Amoxicillin vs Amoxicillin-Clavulanate: is Augmentin stronger, and when is it worth the price?
The short answer
Augmentin is not a stronger amoxicillin. It is amoxicillin plus clavulanate — a shield against resistant bacteria — so against ordinary infections the two work the same, and Augmentin only earns its higher price when a course of amoxicillin has failed or the infection is one where resistance is common, like sinusitis or some ear infections. Amoxicillin remains the right first choice for straightforward infections.
This is probably the most common antibiotic upgrade question in Nigeria, and the honest answer is that many people buy Augmentin when amoxicillin would have done the job. The clavulanate in Augmentin doesn't kill bacteria itself — it disables the enzyme (beta-lactamase) that resistant bacteria use to destroy amoxicillin. If the bacteria causing your infection don't make that enzyme, you've paid several times the price for the same effect, plus a higher chance of stomach upset and diarrhoea.
The bigger issue behind this choice is antibiotic resistance, which is rising fast in Nigeria partly because antibiotics are bought casually without tests or prescriptions. Whichever of these you take: complete the full course, and if you're not improving after two to three days, see a clinician instead of simply buying something stronger.
Side by side
| Amoxicillin | Amoxicillin-Clavulanate | |
|---|---|---|
| What it is | A penicillin-class antibiotic | Amoxicillin + clavulanate (a beta-lactamase blocker) |
| Best for | Simple throat, ear, chest, and urinary infections | Resistant or recurrent infections, sinusitis, animal/human bites |
| Stomach upset | Less common | More common — diarrhoea is the classic complaint |
| When it fails | May mean resistant bacteria — step up sensibly | Failure needs a clinic visit and ideally a culture test, not another guess |
| Drug class | Beta-lactam antibiotic | Beta-lactam antibiotic with beta-lactamase inhibitor |
| Typical price | varies by brand and pack | ~₦13,700 online (tablets) (October 2026) |
| NAFDAC registrations | 38 active Greenbook listings | 89 active Greenbook listings |
| Common brands | Amoxil 250, Amoxil Suspension | Fleming 1000, Fleming 457 Suspension |
Prices are sampled from licensed Nigerian online pharmacies and span brands and pack sizes — indicative only. Registration counts are from our copy of the NAFDAC Greenbook (October 2026); listings can lag renewals.
Reach for Amoxicillin when…
- •First treatment of an uncomplicated infection
- •A clinician prescribed it — don't self-upgrade
- •Budget matters and there's no history of treatment failure
Reach for Amoxicillin-Clavulanate when…
- •A full, correctly-taken amoxicillin course just failed
- •Sinusitis, some middle-ear infections, or infected bites
- •A clinician chose it for likely beta-lactamase-producing bacteria
Frequently asked questions
Educational comparison, not a prescription. Both medicines have full guides covering dosage, side effects, and warnings — talk to a pharmacist or doctor before switching. Updated September 2026.