Augmentin vs. Macrobid
See how Augmentin and Macrobid compare on approved uses, dosing, side effects, and cost.
Key Takeaways
Augmentin is a broad-spectrum penicillin combination used for respiratory, skin, ear, sinus, and urinary infections, while Macrobid is a narrower antibiotic used only for uncomplicated bladder infections.
Augmentin is typically taken every 8 to 12 hours for about 7 to 10 days, whereas Macrobid is taken twice daily for just 5 to 7 days.
Macrobid carries unique long-term risks like lung and nerve damage, while Augmentin's main concerns are liver toxicity and C. diff-associated diarrhea.
Augmentin vs. Macrobid Drug Summary
Augmentin
Augmentin combines amoxicillin with clavulanate, a beta-lactamase inhibitor, to treat a wide range of bacterial infections including respiratory, ear, sinus, skin, and urinary tract infections. It comes as a tablet, chewable tablet, or oral suspension, usually taken every 8 to 12 hours depending on the strength prescribed.
Macrobid
Macrobid is a urinary anti-infective that treats uncomplicated bladder infections caused by E. coli or S. saprophyticus. It is taken as a capsule twice daily for 5 to 7 days and concentrates in urine rather than the bloodstream, so it only works for lower urinary tract infections.
Augmentin vs. Macrobid Side Effects
Augmentin
Macrobid
Augmentin vs. Macrobid Dosage
Augmentin
Macrobid
| STAGE | DOSE | WHEN |
| Starting dose | 250 mg/125 mg every 8h | At the start |
| Maximum dose | 2000 mg/125 mg q12h | If needed |
| Dose changes | 4 increases | As tolerated |
| STAGE | DOSE | WHEN |
| Starting dose | 100 mg every 12 hrs | Days 1-7 |
| Maximum dose | 100 mg every 12 hrs | Same as starting |
| Dose changes | None | Fixed dose |
Augmentin
| STAGE | DOSE | WHEN |
| Starting dose | 250 mg/125 mg every 8h | At the start |
| Maximum dose | 2000 mg/125 mg q12h | If needed |
| Dose changes | 4 increases | As tolerated |
Macrobid
| STAGE | DOSE | WHEN |
| Starting dose | 100 mg every 12 hrs | Days 1-7 |
| Maximum dose | 100 mg every 12 hrs | Same as starting |
| Dose changes | None | Fixed dose |
Augmentin vs. Macrobid Indications
Augmentin
Augmentin is FDA-approved for a broad range of bacterial infections thanks to its added beta-lactamase inhibitor, which helps it work against resistant strains. It covers respiratory, ear, sinus, skin, and urinary tract infections in both adults and children.
Lower respiratory tract infections
Acute bacterial otitis media
Acute bacterial sinusitis
Macrobid
Macrobid is FDA-approved only for uncomplicated bladder infections caused by susceptible E. coli or S. saprophyticus. It is not approved for kidney infections or use in young children, and it is sometimes prescribed off-label for long-term UTI prevention.
Acute uncomplicated cystitis (bladder infection)
Caused by E. coli or S. saprophyticus
Long-term UTI prevention (off-label use)
Augmentin vs. Macrobid Pros and Cons
Augmentin
Augmentin's broad spectrum makes it useful for many types of infections beyond the urinary tract, but that same breadth means more potential for GI side effects and drug interactions. It has no boxed warning, but liver toxicity and C. diff-related diarrhea remain real risks with any course.
Pros
Treats respiratory, skin, ear, and sinus infections, not just UTIs
Available in chewable and liquid forms for children
Multiple dose strengths allow flexible treatment lengths
No FDA boxed warning
Cons
More gastrointestinal side effects overall, including diarrhea
Not usable in patients with penicillin allergy history
Contraindicated after prior amoxicillin/clavulanate liver injury
Shorter shelf life once mixed as liquid suspension
Macrobid
Macrobid's narrow focus on the urinary tract limits GI-related side effects but also limits its usefulness to lower urinary infections only. It carries distinctive long-term risks like lung and nerve damage that make it less suitable for prolonged or repeated use without monitoring.
Pros
Fewer GI side effects than broad-spectrum antibiotics like Augmentin
Shorter typical course of 5 to 7 days
Remains effective against E. coli despite decades of use
Simple twice-daily dosing with no titration
Cons
Only treats lower urinary tract infections, not kidney infections
Not safe for patients with reduced kidney function
Risk of pulmonary and nerve damage with long-term use
Cannot be used in children under 12
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