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Voquezna Dual Pak Side Effects

Generic name: amoxicillin / vonoprazan

Medically reviewed by Last updated on Oct 30, 2023.

Note: This document contains side effect information about amoxicillin / vonoprazan. Some dosage forms listed on this page may not apply to the brand name Voquezna Dual Pak.

Applies to amoxicillin / vonoprazan: oral capsule, oral tablet.

Serious side effects of Voquezna Dual Pak

Along with its needed effects, amoxicillin / vonoprazan may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur while taking amoxicillin / vonoprazan:

More common

  • Diarrhea

Less common

  • Acid or sour stomach
  • anxiety
  • belching
  • black, tarry stools
  • bladder pain
  • blistering, crusting, irritation, itching, or reddening of the skin
  • bloated
  • bloody or cloudy urine
  • blurred vision
  • body aches or pain
  • change in taste
  • chest pain or tightness
  • chills
  • cold flu-like symptoms
  • constipation
  • cracked, dry, or scaly skin
  • cough or hoarseness
  • diarrhea
  • difficult, burning, or painful urination
  • discouragement
  • dizziness
  • dry mouth
  • ear congestion
  • excess air or gas in stomach or intestines
  • eye pain
  • fainting
  • feeling sad or empty
  • fever
  • frequent urge to urinate
  • full feeling
  • general feeling of illness
  • greatly decreased frequency of urination or amount of urine
  • headache
  • heartburn
  • indigestion
  • irregular heartbeat recurrent
  • irritability
  • itching of the vagina or genitals
  • lack of appetite
  • loss of interest or pleasure
  • loss of taste
  • loss of voice
  • lower back or side pain
  • nausea
  • nervousness
  • pain or swelling in the arms or legs without any injury
  • pale skin
  • passing gas
  • pounding in the ears
  • slow or fast heartbeat
  • sneezing
  • sore throat
  • sores, ulcers, or white spots in the mouth or on the lips
  • stomach bloating, burning, cramping, discomfort, upset, or pain
  • stuffy or runny nose
  • swelling around the eyes
  • swelling of feet or lower legs
  • swelling or inflammation of the mouth
  • thick, white vaginal discharge with mild or no odor
  • trouble breathing
  • trouble concentrating
  • trouble sleeping
  • unusual bleeding or bruising
  • unusual tiredness or weakness
  • vomiting
  • weight loss
  • white or brownish vaginal discharge

Incidence not known

  • Black, hairy tongue
  • bleeding gums
  • blistering, peeling, or loosening of the skin
  • blood in the urine or stools
  • confusion about identity, place, and time
  • coughing up blood
  • dark urine
  • diarrhea, watery and severe, which may also be bloody
  • difficulty swallowing
  • feeling of unreality
  • increased menstrual flow or vaginal bleeding
  • increased thirst
  • joint or muscle pain
  • large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs
  • light-colored stools
  • nosebleeds
  • palpitations
  • paralysis
  • pinpoint red spots on skin
  • prolonged bleeding from cuts
  • puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
  • red irritated eyes
  • red skin lesions, often with a purple center
  • seizures
  • sense of detachment from self or body
  • stiff neck or back
  • swollen glands
  • unpleasant breath odor
  • vomiting of blood
  • yellow eyes or skin

For Healthcare Professionals

Applies to amoxicillin / vonoprazan: oral kit.


The most common adverse reaction leading to discontinuation of this product was rash.[Ref]


Common (1% to 10%): Hypertension (includes increased blood pressure)

Frequency not reported: QT prolongation, tachycardia[Ref]


Frequency not reported: Dermatitis, dry skin, rash

Amoxicillin and Vonoprazan:

-Frequency not reported: Severe cutaneous adverse reactions (including Stevens-Johnson syndrome, toxic epidermal necrolysis)


-Frequency not reported: Erythematous skin rash

-Postmarketing reports: Mucocutaneous candidiasis, erythematous maculopapular rashes, erythema multiforme, exfoliative dermatitis, urticaria, toxic epidermal necrolysis, Stevens-Johnson syndrome, drug reaction with eosinophilia and systemic symptoms (DRESS), acute generalized exanthematous pustulosis


-Postmarketing reports: Urticaria, drug eruption, erythema multiforme, Stevens-Johnson syndrome, toxic epidermal necrolysis[Ref]


Common (1% to 10%): Diarrhea, abdominal pain (includes abdominal discomfort, abdominal pain, lower abdominal pain, upper abdominal pain)

Frequency not reported: Abdominal distension, constipation, dry mouth, duodenal polyp, duodenal ulcer, dyspepsia, flatulence, gastric ulcer, gastroesophageal reflux disease, hematochezia, large intestine polyp, nausea, rectal polyp, stomatitis, tongue discomfort, vomiting, anal fungal infection, gastrointestinal viral infection, oral fungal infection, tongue fungal infection


-Frequency not reported: Clostridioides difficile-associated diarrhea

-Postmarketing reports: Black hairy tongue, hemorrhagic/pseudomembranous colitis, tooth discoloration (brown, yellow, or gray staining)

Acid-Suppressing Therapies:

-Frequency not reported: C difficile-associated diarrhea[Ref]

Onset of pseudomembranous colitis symptoms has been reported during or after antibacterial treatment.

Most reports of tooth discoloration with amoxicillin occurred in pediatric patients; discoloration was reduced/eliminated with brushing or dental cleaning in most cases.[Ref]


Common (1% to 10%): Vulvovaginal candidiasis (includes urogenital fungal infection, vulvovaginal candidiasis, vulvovaginal mycotic infection, vulvovaginal pruritus, genital pruritus, genital fungal infection)

Frequency not reported: Urinary tract infection, vaginal discharge


-Postmarketing reports: Crystalluria[Ref]


Hemolytic anemia, thrombocytopenia, thrombocytopenic purpura, eosinophilia, and agranulocytosis have been reported during therapy with penicillins; these reactions were usually reversible when therapy was stopped and were believed to be hypersensitivity phenomena.[Ref]

Frequency not reported: Anemia, leukocytosis, leukopenia, neutropenia


-Postmarketing reports: Hemolytic anemia, thrombocytopenia, thrombocytopenic purpura, eosinophilia, agranulocytosis[Ref]


Frequency not reported: Abnormal liver function test


-Postmarketing reports: Hepatic injury, hepatic failure, jaundice[Ref]


Frequency not reported: Drug hypersensitivity

Amoxicillin and Vonoprazan:

-Frequency not reported: Hypersensitivity reactions (e.g., anaphylaxis, anaphylactic shock, rash, erythema multiforme, Henoch-Schonlein purpura)


-Postmarketing reports: Anaphylaxis, serum sickness-like reactions, hypersensitivity vasculitis


-Postmarketing reports: Anaphylactic shock[Ref]


Frequency not reported: Decreased appetite[Ref]


Frequency not reported: Bone fracture[Ref]

Nervous system

Common (1% to 10%): Headache

Uncommon (0.1% to 1%): Dysgeusia (includes taste disorder)

Frequency not reported: Ageusia, dizziness, tension headache


-Postmarketing reports: Reversible hyperactivity, convulsions, aseptic meningitis[Ref]


Frequency not reported: Orbital edema[Ref]


Frequency not reported: Fatigue, pyrexia, viral infection[Ref]


Frequency not reported: Anxiety, depression, insomnia


-Postmarketing reports: Agitation, confusion, behavioral changes[Ref]


Frequency not reported: Renal hypertrophy, tubulointerstitial nephritis[Ref]


Common (1% to 10%): Nasopharyngitis

Frequency not reported: Pneumonia, upper respiratory tract infection, cough, nasal polyps, oropharyngeal pain[Ref]


1. Product Information. Voquezna Dual Pak (amoxicillin-vonoprazan). Phathom Pharmaceuticals, Inc. 2022.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.