Wymox - Use | Dose | Side Effects

This article was medically reviewed by M.Pharm, Marko Tanaskovic on August 12, 2018. To read more about an author, click here.

Wymox is a medicine that contains amoxicillin (antibiotic from the group of penicillin). It is used orally to treat infections. It works by killing bacteria (bactericidal effect).

Mostly, this medicine is used to treat sinus infections, inflammation of the tonsils, pneumonia (infection of the lungs) and urinary tract infections. It is not effective against cold and flu. This medicine should be prescribed by your doctor (belongs to prescription-only medicines).


As all other medicines, this one too may cause allergic reaction. If you are experiencing symptoms of an allergy (skin rash, itchy skin or edema) you should call your doctor immediately.

This medicine should be avoided in patients with renal impairment, because it is mostly excreted through kidneys. Dose should be reduced in patients with decreased renal function.

It should be avoided in patients with mononucleosis.

if you are taking oral contraceptives, you should know that this medicine reduce their effectiveness. Therefore, you will need to use an extra contraception methods that can't be affected with this medicine.

You should avoid use of this medicine if you have a rare genetic disorder called phenylketonuria.

It should be used with extra precautions in patients with asthma.

Use of Wymox during pregnancy and breastfeeding

Wymox should be used during pregnancy, only if prescribed by your doctor. There are not enough data regarding use of Wymox during pregnancy.

It passes into breast milk, therefore avoid breastfeeding while taking this medicine.

How to use

Take this medicine with a full glass of water. Swallow it whole, without chewing.

Dose depends on severity of infections. Usual dose in the treatment of mild infections, such as: sinusitis, tonsillitis and cystitis is 500 mg three times a day. Usual dose in the treatment of severe infections is 3000 mg taken twice a day.

It should be used one hour prior or two hours after meal.

Use with other medicines (Interactions)

Wymox should be avoided in combination with following medicines:

  • Blood thinners, such as: warfarin and acenocoumarol. Concomitant use of Wymox with these medicines, increases the risk of bleeding.
  • Medications used to treat gout, such as:
    • probenecid,
    • indomethacine and allopurinol.
  • Other medications used to treat infections, such as:
    • doxycycline,
    • azithromycin,
    • telithromycin,
    • clarithromycin and others.

Inform your doctor if you are taking any other medicines.

Side effects

Wymox may cause following side effects:

  • Agitation (emotional disturbance)
  • Pale skin (unusual color of skin)
  • Bleeding
  • Fungal infections
  • Stomach pain
  • Fatigue
  • Diarrhea
  • Allergy
  • Anxiety
  • Drowsiness
  • Headache

You should call your doctor right away if you are experiencing any side effects.

Information on this website are provided for educational purposes only and are not intended for medical advice, diagnosis or treatment.

If you have any concerns or questions about your health, you should always consult with a physician or other health-care professional.

We and our partners use technology such as cookies on our site to personalise content and ads, provide social media features, and analyse our traffic. Click below to consent to the use of this technology across the web. You can change your mind and change your consent choices at anytime by returning to this site.