What it is used for
- Throat infections such as strep throat and tonsillitis
- Some ear infections
- Certain skin infections
- Some dental infections
- Prevention of certain infections in people at higher risk, such as those without a working spleen
How it works
Penicillin V is a classic penicillin antibiotic taken by mouth. It stops bacteria from building their cell walls so they break apart and die. It treats certain bacterial infections and does not work against viruses.
How it is taken
Comes as tablets and a liquid (oral suspension). Take it exactly as your doctor or pharmacist directs and follow the label. It is often taken on an empty stomach for better absorption. Complete the full course as advised.
No doses here on purpose. The right strength and schedule depend on you — only a doctor or pharmacist should set them. Always follow your prescription and the label.
Common side effects
- Nausea
- Diarrhoea
- Stomach upset
- Mild rash
- Thrush
Serious effects — get help
- Severe allergic reaction with swelling of the face or throat or breathing difficulty
- Severe, persistent or bloody diarrhoea
- Severe blistering skin reactions
- Unusual bruising or bleeding
If a reaction is severe — for example trouble breathing, swelling of the face or throat, or collapse — go to the nearest emergency room now or call your local emergency number. Do not wait for an online consultation.
Interactions to watch
- Methotrexate
- Blood thinners such as warfarin
- Some other antibiotics
- Hormonal contraception may be less reliable during vomiting or diarrhoea
Who should take care
- Tell your clinician about any penicillin allergy
- Tell your clinician if you have kidney problems
- Take on an empty stomach when advised for best effect
- Discuss pregnancy or breastfeeding with your doctor or pharmacist
- Complete the full course even if you feel better