Penicillin V potassium

generic

Penicillin V potassium Side Effects

Upset stomach, nausea, vomiting, diarrhea, and mouth sores may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.

Although this effect is uncommon, you may develop a black, "hairy" tongue while taking this medication. This effect is harmless and usually goes away after treatment. Maintain good oral hygiene, and brush your tongue with a soft toothbrush twice a day. Consult your doctor or pharmacist for more information.

Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

Tell your doctor right away if you have any serious side effects, including: unusual tiredness, joint/muscle pain, easy bruising/bleeding.

This medication may rarely cause a severe intestinal condition (Clostridium difficile-associated diarrhea) due to a type of resistant bacteria. This condition may occur during treatment or weeks to months after treatment has stopped. Do not use anti-diarrhea or opioid medications if you have any of the following symptoms because these products may make them worse. Tell your doctor right away if you develop: persistent diarrhea, abdominal or stomach pain/cramping, blood/mucus in your stool.

Use of this medication for prolonged or repeated periods may result in oral thrush or a new vaginal yeast infection (oral or vaginal fungal infection). Contact your doctor if you notice white patches in your mouth, a change in vaginal discharge or other new symptoms.

A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), new fever, severe dizziness, trouble breathing.

This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

In the US -

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.

In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
  • Clostridioides difficile infection
  • autoimmune hemolytic anemia
  • anemia
  • idiopathic thrombocytopenic purpura
  • thrombocytopenic disorder
  • agranulocytosis
  • leukopenia
  • neutropenic disorder
  • eosinophilia
  • acute confusion
  • agitation
  • behavioral disorders
  • hypersensitivity angiitis
  • laryngeal edema
  • dental discoloration
  • drug-induced hepatitis
  • obstructive hyperbilirubinemia
  • interstitial nephritis
  • erythema multiforme
  • toxic epidermal necrolysis
  • Stevens-Johnson syndrome
  • exfoliative dermatitis
  • pruritus of skin
  • urticaria
  • seizure disorder
  • dizziness
  • insomnia
  • skin rash
  • nausea
  • vomiting
  • diarrhea
  • abdominal pain with cramps
  • crystalluria
  • abnormal hepatic function tests
  • anaphylaxis
  • serum sickness
  • mucocutaneous candidiasis
  • maculopapular rash
  • furred tongue
  • acute generalized exanthematous pustulosis
  • DRESS syndrome
  • symptoms of anxiety

Drug Interactions

Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.

Some products that may interact with this drug are: methotrexate, tetracyclines, khat, guar gum.

Penicillin may cause false positive results with certain diabetic urine testing products (cupric sulfate-type). This drug may also affect the results of certain lab tests. Make sure laboratory personnel and your doctors know you use this drug.