Skip to Content

Normodyne Side Effects

Generic Name: labetalol

Note: This page contains side effects data for the generic drug labetalol. It is possible that some of the dosage forms included below may not apply to the brand name Normodyne.

For the Consumer

Applies to labetalol: oral tablet

Other dosage forms:

As well as its needed effects, labetalol (the active ingredient contained in Normodyne) may cause unwanted side effects that require medical attention.

Major Side Effects

If any of the following side effects occur while taking labetalol, check with your doctor immediately:

Less common:
  • Blurred vision or other changes in vision
  • chills
  • cold sweats
  • confusion
  • difficult or labored breathing
  • dizziness, faintness, or lightheadedness when getting up from lying or sitting position
  • shortness of breath
  • swelling of face, fingers, feet, or lower legs
  • tightness in chest
  • wheezing

If any of the following symptoms of overdose occur while taking labetalol, get emergency help immediately:

Symptoms of overdose:
  • Chest pain or discomfort
  • lightheadedness, dizziness, or fainting
  • slow or irregular heartbeat
  • sweating
  • unusual tiredness or weakness

Minor Side Effects

Some labetalol side effects may not need any medical attention. As your body gets used to the medicine these side effects may disappear. Your health care professional may be able to help you prevent or reduce these side effects, but do check with them if any of the following side effects continue, or if you are concerned about them:

More common:
  • Nausea
Less common:
  • Acid or sour stomach
  • belching
  • change in taste or bad, unusual, or unpleasant (after) taste
  • decreased interest in sexual intercourse
  • feeling of constant movement of self or surroundings
  • headache
  • heartburn
  • inability to have or keep an erection
  • indigestion
  • lack or loss of strength
  • loss in sexual ability, desire, drive, or performance
  • not able to ejaculate semen
  • rash
  • sensation of spinning
  • stomach discomfort, upset, or pain
  • stuffy nose
Rare
  • Burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
  • diarrhea
  • increased sweating
  • vomiting

For Healthcare Professionals

Applies to labetalol: compounding powder, intravenous solution, oral tablet

Cardiovascular

Common (1% to 10%): Edema, postural hypotension
Frequency not reported: Bradycardia, heart block, heart failure, hypotension, ankle edema, increase of an existing intermittent claudication, postural hypotension, cold or cyanotic extremities, Raynaud's phenomenon, paresthesia of the extremities, syncope[Ref]

Dermatologic

Uncommon (0.1% to 1%): Increased sweating
Frequency not reported: Systemic lupus erythematosus, rashes (e.g., generalized maculopapular, lichenoid, urticarial, bullous lichen planus, psoriaform, facial erythema, Peyronie's disease, reversible alopecia)[Ref]

Endocrine

Frequency not reported: Masking of the normal response to hypoglycemia (sweating and tachycardia); this may be important in some patients with diabetes mellitus[Ref]

Gastrointestinal

Common (1% to 10%): Nausea, dyspepsia, vomiting
Uncommon (0.1% to 1%): Diarrhea
Frequency not reported: Epigastric pain[Ref]

Genitourinary

Common (1% to 10%): Ejaculation failure, impotence
Frequency not reported: Difficulty in micturition (including acute urinary bladder retention)[Ref]

Hepatic

Common (1% to 10%): Transient elevations of liver function tests
Frequency not reported: Hepatic necrosis, hepatitis, cholestatic jaundice[Ref]

Hypersensitivity

Rare (less than 0.1%): Hypersensitivity (e.g., rash, urticaria, pruritus, angioedema, dyspnea), anaphylactoid reactions[Ref]

Immunologic

Frequency not reported: Antimitochondrial antibodies[Ref]

Metabolic

Very rare (less than 0.01%): Hyperkalemia[Ref]

Musculoskeletal

Frequency not reported: Muscle cramps, toxic myopathy[Ref]

Nervous system

Very common (10% or more): Dizziness (11%)
Common (1% to 10%): Headache, taste distortion, vertigo, paresthesia, scalp tingling
Uncommon (0.1% to 1%): Drowsiness
Frequency not reported: Tremor[Ref]

Ocular

Common (1% to 10%): Vision abnormality
Frequency not reported: Dry eyes
Postmarketing reports: Intraoperative Floppy Iris Syndrome (IFIS) observed during cataract surgery[Ref]

Respiratory

Common (1% to 10%): Nasal stuffiness, dyspnea
Frequency not reported: Bronchospasm, interstitial lung disease[Ref]

Other

Common (1% to 10%): Fatigue, asthenia
Frequency not reported: Positive antinuclear factor[Ref]

Psychiatric

Frequency not reported: Depressed mood and lethargy, hallucinations, psychoses, confusion, sleep disturbances, nightmares[Ref]

References

1. "Product Information. Labetalol Hydrochloride (labetalol)." Watson Pharmaceuticals, Parsippany, NJ.

2. Cerner Multum, Inc. "UK Summary of Product Characteristics." O 0

3. Cerner Multum, Inc. "Australian Product Information." O 0

It is possible that some side effects of Normodyne may not have been reported. These can be reported to the FDA here. Always consult a healthcare professional for medical advice.

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.

Hide