This site is intended for healthcare professionals


Select the drug indication to add to your list

Ampicillin Capsules
Bacterial infections
Compare To Related Drugs
View/Edit/Compare Drugs In My List

Only 4 drugs may be compared at once

Drug Name:

Ampicillin Capsules Rx

Generic Name and Formulations:
Ampicillin 250mg, 500mg; caps.

Various generic manufacturers

Therapeutic Use:

Indications for Ampicillin Capsules:

Ampicillin-sensitive infections.


250–500mg 4 times daily. Continue therapy for 3 days after symptoms improve. N. gonorrhoeae: 3.5g with 1g probenecid once.


<20kg: 50–100mg/kg per day in 3–4 divided doses. ≥20kg: as adult. Continue therapy for 3 days after symptoms improve.


Cephalosporin, imipenem, other allergy or mononucleosis: not recommended. Monitor blood, renal, and liver function in long-term use. Pregnancy (Cat.B). Nursing mothers.


May cause false (+) glucose test with Clinitest, Benedict's or Fehling's soln. Potentiated by probenecid. May increase risk of rash with allopurinol.

See Also:

Ampicillin Suspension

Ampicillin sodium Injection

Pharmacological Class:

Broad-spectrum penicillin.

Adverse Reactions:

Anaphylaxis, urticaria, GI upset, blood dyscrasias.


Formerly known under the brand names Principen, Totacillin, Pfizerpen-A, Penbritin, Omnipen, Amcill (caps, susp); Polycillin-N, Totacillin-N, Penbritin-S, Omnipen-N (inj).

How Supplied:

Contact supplier.

Join MIMS Learning now to manage all your CPD and notes in one place!

By registering you agree with our Terms and Conditions and Privacy Policy.

Already a MIMS Learning member?

Sign In Now »
Integrated with:
Free CPD modules
0.25 Credits

Conjunctivitis and iritis: differential diagnosisExternal web site

Dr Nigel Stollery offers this free module on differentiating between allergic and infective eye conditions...

0.50 Credits

Abnormal liver function tests: case-based discussionExternal web site

GPs frequently see patients with abnormal liver function tests, but which of them actually have alcoholic...

0.50 Credits
Red flags

Breathlessness - red flag symptomsExternal web site

In this free module, Dr Tillmann Jacobi highlights the red flags that you should be aware of in patients...

Font Awesome Icons
View more
Editor's picks
1.00 Credits

Vulvovaginal atrophyExternal web site

Dr Louise Newson highlights vulvovaginal atrophy, a common condition in postmenopausal women for which...

1.00 Credits

Pulse oximetry in primary careExternal web site

Dr Anita Sharma provides an overview of the use of pulse oximetry in general practice. Key learning...

1.00 Credits
Expert Perspective

Acute erythematous rashes in childrenExternal web site

Dr Dharshini Sathishkumar and Dr Helen Goodyear focus on infectious causes of erythematous rashes in...

Font Awesome Icons
View more

is free, fast, and customized just for you!

Already a member?

Sign In Now »