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Amoxicillin / clarithromycin / omeprazole Side Effects

For the Consumer

Applies to amoxicillin / clarithromycin / omeprazole: oral capsule, oral capsule delayed release, oral tablet

In addition to its needed effects, some unwanted effects may be caused by amoxicillin / clarithromycin / omeprazole. In the event that any of these side effects do occur, they may require medical attention.

Major Side Effects

You should check with your doctor immediately if any of these side effects occur when taking amoxicillin / clarithromycin / omeprazole:

Incidence not known:
  • Abdominal or stomach tenderness, cramps, or pain
  • blistering, peeling, or loosening of the skin
  • diarrhea
  • difficulty with swallowing
  • dizziness
  • fast heartbeat
  • fever or chills
  • hives or welts, itching, or skin rash
  • joint or muscle pain
  • large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs
  • muscle pain or weakness
  • puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
  • red skin lesions, often with a purple center
  • redness of the skin
  • sores, ulcers, or white spots in the mouth or on the lips
  • swelling of the body, feet, and ankles
  • tightness in the chest
  • unusual tiredness or weakness
  • unusual weight gain
  • watery and severe diarrhea, which may also be bloody

Minor Side Effects

Some of the side effects that can occur with amoxicillin / clarithromycin / omeprazole may not need medical attention. As your body adjusts to the medicine during treatment these side effects may go away. Your health care professional may also be able to tell you about ways to reduce or prevent some of these side effects. If any of the following side effects continue, are bothersome or if you have any questions about them, check with your health care professional:

More common:
  • Bad, unusual, or unpleasant (after) taste
  • change in taste
  • headache

For Healthcare Professionals

Applies to amoxicillin / clarithromycin / omeprazole: oral kit

General

The most commonly reported side effects included diarrhea, taste perversion, and headache.

Clarithromycin: The most commonly reported side effects included diarrhea, nausea, and abnormal taste.

Omeprazole: The most commonly reported side effects included headache, abdominal pain, and nausea.[Ref]

Gastrointestinal

Very common (10% or more): Diarrhea (up to 14%), taste perversion (up to 10%)
Frequency not reported: Clostridium difficile-associated diarrhea

Amoxicillin:
Postmarketing reports: Diarrhea, hemorrhagic/Clostridium difficile-associated colitis, nausea, tooth discoloration, vomiting

Clarithromycin:
Common (1% to 10%): Abdominal pain/discomfort, diarrhea, dyspepsia, nausea
Postmarketing reports: Glossitis, oral moniliasis, pancreatitis, stomatitis, tooth/tongue discoloration, vomiting

Omeprazole:
Common (1% to 10%): Abdominal pain, acid regurgitation, constipation, diarrhea, flatulence, nausea, vomiting
Postmarketing reports: Abdominal swelling, dry mouth, esophageal candidiasis, fecal discoloration, gastric fundic gland polyps, irritable colon, mucosal atrophy of the tongue, pancreatitis/fatal pancreatitis, stomatitis[Ref]

Nervous system

Common (1% to 10%): Headache
Frequency not reported: Myasthenia gravis

Amoxicillin:
Postmarketing reports: Dizziness, reversible hyperactivity

Clarithromycin:
Common (1% to 10%): Abnormal taste, headache
Postmarketing reports: Altered sense of smell, convulsions, dizziness, taste perversion/loss, tremor, vertigo

Omeprazole:
Common (1% to 10%): Dizziness, headache
Postmarketing reports: Hepatic encephalopathy, paresthesia, somnolence, taste perversion, tremors, vertigo[Ref]

Hypersensitivity

Postmarketing reports: Hypersensitivity

Clarithromycin:
Postmarketing reports: Allergic reactions, anaphylaxis

Omeprazole:
Postmarketing reports: Anaphylactic shock, anaphylaxis, angioedema, hypersensitivity reactions[Ref]

Metabolic

Amoxicillin:
Postmarketing reports: Elevated alkaline phosphatase/lactate dehydrogenase

Clarithromycin:
Very rare (less than 0.01%): Anorexia
Postmarketing reports: Hypoglycemia

Omeprazole:
Postmarketing reports: Anorexia, hypoglycemia, hyponatremia, weight gain[Ref]

Dermatologic

Amoxicillin:
Postmarketing reports: Acute generalized exanthematous pustulosis, erythema multiforme, erythematous maculopapular rashes, exfoliative dermatitis, hypersensitivity vasculitis, Stevens-Johnson syndrome, toxic epidermal necrolysis, urticaria

Clarithromycin:
Postmarketing reports: Mild skin eruptions, Stevens-Johnson syndrome, toxic epidermal necrolysis, urticaria

Omeprazole:
Common (1% to 10%): Rash
Postmarketing reports: Alopecia, dry skin, erythema hyperhidrosis, multiforme, petechia, photosensitivity, severe generalized skin reactions, skin inflammation pruritus, Stevens-Johnson syndrome, toxic epidermal necrolysis/fatal toxic epidermal necrolysis, urticaria[Ref]

Hepatic

Amoxicillin:
Postmarketing reports: Acute cytolytic hepatitis, AST/ALT/GGT/total bilirubin elevation, cholestatic jaundice, hepatic dysfunction, hepatic cholestasis

Clarithromycin:
Postmarketing reports: Cholestatic/hepatocellular hepatitis with/without jaundice, hepatic dysfunction, haptic failure with fatal outcome, increased liver enzymes

Omeprazole:
Postmarketing reports: Cholestatic disease, hepatic failure/fatal hepatic failure, hepatocellular disease, jaundice, liver disease, liver necrosis/fatal liver necrosis, liver function test elevations (e.g., AST, ALT, bilirubin, GGT, alkaline phosphatase), mixed hepatitis[Ref]

Hematologic

Amoxicillin:
Postmarketing reports: Agranulocytosis, anemia, decreased white blood cells, eosinophilia, hemolytic anemia, increased prothrombin time, leukopenia, thrombocytopenia, thrombocytopenic purpura

Clarithromycin:
Postmarketing reports: Leukopenia, neutropenia, thrombocytopenia

Omeprazole:
Postmarketing reports: Agranulocytosis/fatal agranulocytosis, anemia, hemolytic anemia, leukocytosis, leukopenia, neutropenia, pancytopenia, purpura, thrombocytopenia[Ref]

Psychiatric

Amoxicillin:
Postmarketing reports: Agitation, anxiety, behavioral changes, confusion, insomnia

Clarithromycin:
Postmarketing reports: Anxiety, behavioral changes, confusional state, depersonalization, disorientation, hallucinations, insomnia, manic behavior, nightmares, psychosis

Omeprazole:
Postmarketing reports: Aggression, agitation, anxiety, apathy, confusion, depression, dream abnormalities, hallucination, insomnia, nervousness, psychiatric and sleep disturbances[Ref]

Renal

Amoxicillin:
Postmarketing reports: Elevated blood urea nitrogen (BUN)/serum creatinine

Clarithromycin:
Postmarketing reports: Interstitial nephritis

Omeprazole:
Postmarketing reports: Glycosuria, increased serum creatinine, interstitial nephritis[Ref]

Other

Clarithromycin:
Postmarketing reports: Hearing loss, tinnitus

Omeprazole:
Common (1% to 10%): Asthenia
Postmarketing reports: Fatigue, fever, malaise, pain, tinnitus[Ref]

Cardiovascular

Clarithromycin:
Postmarketing reports: QT prolongation, torsade de pointes, ventricular arrhythmia/tachycardia

Omeprazole:
Postmarketing reports: Angina, blood pressure elevation, bradycardia, chest pain palpitations, peripheral edema, tachycardia[Ref]

Genitourinary

Amoxicillin:
Postmarketing reports: Crystalluria

Omeprazole:
Postmarketing reports: Hematuria, microscopic pyuria, proteinuria, testicular pain, urinary frequency, urinary tract infection[Ref]

Respiratory

Omeprazole:
Common (1% to 10%): Cough, Upper respiratory tract infection
Postmarketing reports: Bronchospasm, epistaxis, pharyngeal pain[Ref]

Musculoskeletal

Omeprazole:
Common (1% to 10%): Back pain
Postmarketing reports: Joint pain, leg pain, muscle cramps/weakness, myalgia[Ref]

Ocular

Omeprazole:
Postmarketing reports: Anterior ischemic optic neuropathy, blurred vision, double vision, dry eye syndrome, ocular irritation, optic atrophy, optic neuritis[Ref]

Oncologic

Omeprazole:
Postmarketing reports: Gastroduodenal carcinoma[Ref]

Endocrine

Omeprazole:
Postmarketing reports: Gynecomastia[Ref]

Immunologic

Amoxicillin:
Frequency not reported: Serum sickness-like reaction[Ref]

References

1. "Product Information. Omeclamox-Pak (amoxicillin / clarithromycin / omeprazole)." Pernix Therapeutics, Magnolia, TX.

Not all side effects for amoxicillin / clarithromycin / omeprazole may be reported. You should always consult a doctor or healthcare professional for medical advice. Side effects can be reported to the FDA here.

Disclaimer: Every effort has been made to ensure that the information provided is accurate, up-to-date and complete, but no guarantee is made to that effect. In addition, the drug information contained herein may be time sensitive and should not be utilized as a reference resource beyond the date hereof. This material does not endorse drugs, diagnose patients, or recommend therapy. This information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill , knowledge, and judgement of healthcare practitioners in patient care. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate safety, effectiveness, or appropriateness for any given patient. Drugs.com does not assume any responsibility for any aspect of healthcare administered with the aid of materials provided. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the substances you are taking, check with your doctor, nurse, or pharmacist.

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