Omacor Side Effects
Generic name: omega-3 polyunsaturated fatty acids
Note: This document contains side effect information about omega-3 polyunsaturated fatty acids. Some of the dosage forms listed on this page may not apply to the brand name Omacor.
Some side effects of Omacor may not be reported. Always consult your doctor or healthcare specialist for medical advice. You may also report side effects to the FDA.
For the Consumer
Applies to omega-3 polyunsaturated fatty acids: oral capsule liquid filled
Along with its needed effects, omega-3 polyunsaturated fatty acids (the active ingredient contained in Omacor) 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 omega-3 polyunsaturated fatty acids:Incidence not known
- Bleeding gums
- coughing up blood
- difficulty with breathing or swallowing
- fast or irregular heartbeat
- increased menstrual flow or vaginal bleeding
- prolonged bleeding from cuts
- puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
- red or black, tarry stools
- red or dark brown urine
- shortness of breath
- skin rash
- tightness in the chest
- unusual tiredness or weakness
Some side effects of omega-3 polyunsaturated fatty acids may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:Less common
- Acid or sour stomach
- bad, unusual, or unpleasant (after) taste
- bloated or full feeling
- change in taste
- excess air or gas in the stomach
- stomach discomfort, upset, or pain
- difficulty having a bowel movement (stool)
- loss of appetite
- nausea or vomiting
- passing of gas
- stomach fullness
For Healthcare Professionals
Applies to omega-3 polyunsaturated fatty acids: oral capsule, oral delayed release capsule, oral liquid
Gastrointestinal side effects including eructation (4.9%), dyspepsia (3.1%), anorexia, constipation, dry mouth, dysphagia, colitis, fecal incontinence, gastritis, gastroenteritis, gastrointestinal disorder, increased appetite, intestinal obstruction, melena, pancreatitis, tenesmus, and vomiting have been reported.
General side effects including infection (4.4%), flu syndrome (3.5%), back pain (2.2%), pain (1.8%), enlarged abdomen, asthenia, body odor, chest pains, chills, suicide, fever, generalized edema, fungal infection, malaise, neck pain, sudden death, and viral infection have been reported.
Other side effects including taste perversion (2.7%) and lymphadenopathy have been reported.
Dermatologic side effects including rashes (1.8%), alopecia, eczema, pruritus, and sweating have been reported.
One study concluded that omega-3 fatty acid supplementation reduced heart rate and QRS duration in heart transplant recipients who were presumably devoid of vagal intervention. These findings suggest that omega-3 fatty acids may modify the electrophysiologic properties of the myocardium itself.
Cardiovascular side effects including angina pectoris (1.3%), arrhythmia, bypass surgery, cardiac arrest, hyperlipidemia, hypertension, migraine, myocardial infarct, myocardial ischemia, occlusion, peripheral vascular disorder, syncope, and tachycardia have been reported.
Musculoskeletal side effects including rheumatoid arthritis, arthralgia, arthritis, myalgia, pathological fracture, and tendon disorder have been reported.
Metabolic side effects including edema, hyperglycemia, increased ALT and increased AST have been reported.
Nervous system side effects including depression, dizziness, emotional lability, facial paralysis, insomnia, vasodilation, and vertigo have been reported.
Respiratory side effects including asthma, bronchitis, increased cough, dyspnea, epistaxis, laryngitis, pharyngitis, pneumonia, rhinitis, and sinusitis have been reported.
Genitourinary side effects including cervical disorder, endometrial carcinoma, epididymitis, and impotence have been reported.
Hypersensitivity side effects including anaphylactic reaction have been reported.
Oncologic side effects including neoplasm and central nervous system neoplasia have been reported.
Ocular side effects including cataract have been reported.
Hematologic side effects including hemorrhagic diathesis have been reported.
More Omacor resources
- Omacor Prescribing Information (FDA)
- Omacor Monograph (AHFS DI)
- Omacor Advanced Consumer (Micromedex) - Includes Dosage Information
- Omacor Consumer Overview
- Animi-3 MedFacts Consumer Leaflet (Wolters Kluwer)
- Animi-3 Prescribing Information (FDA)
- Animi-3 with Vitamin D Prescribing Information (FDA)
- Divista MedFacts Consumer Leaflet (Wolters Kluwer)
- Divista Prescribing Information (FDA)
- Dry Eye Omega Benefits Consumer Overview
- Fish Oil Consumer Overview
- Lovaza Prescribing Information (FDA)
- Lovaza MedFacts Consumer Leaflet (Wolters Kluwer)
- Mi-Omega NF Prescribing Information (FDA)
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