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Benicar Side Effects Center
Medical Editor: Charles Patrick Davis, MD, PhD
Benicar (olmesartan medoxomil) is an angiotensin II receptor antagonist used to reduce and control hypertension (high blood pressure). Generic Benicar is available outside of the US as olmesartan medoxomil. Common side effects of Benicar include dizziness, bronchitis, back pain, headache, flu-like symptoms, hematuria, and sinusitis.
Benicar is available in strengths of 5, 20, or 40 mg of olmesartan medoxomil tablets. The usual recommended starting dose is 20 mg per day but dosage in pediatric patients needs to be calculated for each individual. Potentially serious side effects include difficulty with breathing or swallowing, chest pain, cough, vertigo, abdominal pain, hyperkalemia, renal failure, and rhabdomyolysis. Benicar should not be used in pregnancy due to possible fetal damage or death; lactating women and their doctors need to weigh the advantages vs the possible harm if the drug is used. There is only one study in pediatric patients (ages 1-16 years) that suggests that Benicar is well tolerated with similar side effects seen in adults.
Our Benicar Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
What is Patient Information in Detail?
Easy-to-read and understand detailed drug information and pill images for the patient or caregiver from Cerner Multum.
Benicar in Detail - Patient Information: Side Effects
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have a serious side effect such as:
- feeling like you might pass out;
- urinating less than usual or not at all;
- chest pain, fast heart rate; or
- swelling in your hands or feet.
Less serious side effects may include:
- joint or muscle pain;
- back pain;
- stomach pain, nausea, diarrhea;
- mild itching or skin rash; or
This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect. You may report side effects to FDA at 1-800-FDA-1088.
Read the entire detailed patient monograph for Benicar (Olmesartan Medoxomil) »
What is Patient Information Overview?
A concise overview of the drug for the patient or caregiver from First DataBank.
Benicar Overview - Patient Information: Side Effects
To reduce the risk of dizziness and lightheadedness, get up slowly when rising from a sitting or lying position.
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 any of these unlikely but serious side effects occur: fainting, slow/irregular heartbeat, unusual decrease in the amount of urine.
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), 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.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
Read the entire patient information overview for Benicar (Olmesartan Medoxomil)»
What is Prescribing information?
The FDA package insert formatted in easy-to-find categories for health professionals and clinicians.
Benicar FDA Prescribing Information: Side Effects
Clinical Trials Experience
Because clinical studies are conducted under widely varying conditions, adverse reaction rates observed in the clinical studies of a drug cannot be directly compared to rates in the clinical studies of another drug and may not reflect the rates observed in practice.
Benicar has been evaluated for safety in more than 3825 patients/subjects, including more than 3275 patients treated for hypertension in controlled trials. This experience included about 900 patients treated for at least 6 months and more than 525 for at least 1 year. Treatment with Benicar was well tolerated, with an incidence of adverse reactions similar to placebo. Events generally were mild, transient and had no relationship to the dose of Benicar.
The overall frequency of adverse reactions was not dose-related. Analysis of gender, age and race groups demonstrated no differences between Benicar and placebo-treated patients. The rate of withdrawals due to adverse reactions in all trials of hypertensive patients was 2.4% (i.e., 79/3278) of patients treated with Benicar and 2.7% (i.e., 32/1179) of control patients. In placebo-controlled trials, the only adverse reaction that occurred in more than 1% of patients treated with Benicar and at a higher incidence versus placebo was dizziness (3% vs. 1%).
The following adverse reactions occurred in placebo-controlled clinical trials at an incidence of more than 1% of patients treated with Benicar, but also occurred at about the same or greater incidence in patients receiving placebo: back pain, bronchitis, creatine phosphokinase increased, diarrhea, headache, hematuria, hyperglycemia, hypertriglyceridemia, influenza-like symptoms, pharyngitis, rhinitis and sinusitis.
The incidence of cough was similar in placebo (0.7%) and Benicar (0.9%) patients.
Other potentially important adverse reactions that have been reported with an incidence of greater than 0.5%, whether or not attributed to treatment, in the more than 3100 hypertensive patients treated with Benicar monotherapy in controlled or open-label trials are listed below.
Body as a Whole: chest pain, peripheral edema
Central and Peripheral Nervous System: vertigo
Heart Rate and Rhythm Disorders: tachycardia
Skin and Appendages: rash
Laboratory Test Findings
In controlled clinical trials, clinically important changes in standard laboratory parameters were rarely associated with administration of Benicar.
Hemoglobin and Hematocrit
Liver Function Tests
Elevations of liver enzymes and/or serum bilirubin were observed infrequently. Five patients (0.1%) assigned to Benicar and one patient (0.2%) assigned to placebo in clinical trials were withdrawn because of abnormal liver chemistries (transaminases or total bilirubin). Of the five Benicar patients, three had elevated transaminases, which were attributed to alcohol use, and one had a single elevated bilirubin value, which normalized while treatment continued.
No relevant differences were identified between the adverse experience profile for pediatric patients aged 1 to 16 years and that previously reported for adult patients.
The following adverse reactions have been reported in post-marketing experience. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure.
Body as a Whole: Asthenia, angioedema, anaphylactic reactions
Metabolic and Nutritional Disorders: Hyperkalemia
Urogenital System: Acute renal failure, increased blood creatinine levels
Read the entire FDA prescribing information for Benicar (Olmesartan Medoxomil) »
Additional Benicar Information
Benicar - User Reviews
Benicar User Reviews
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Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
Get tips on handling your hypertension.