Carvedilol Side Effects, How it Works, Upsides & Downsides

Carvedilol, marketed under the brand name Coreg among others, is a beta blocker. Beta blockers are medications used to reduce blood pressure in the body, regulate heart rhythm and reduce the risk of a second heart attack after the first one. Lowering blood pressure minimizes the risk of stroke, heart attack and complications in the kidney. Furthermore, low blood pressure also reduces the load on the heart as it is relatively easier to pump blood against low blood pressure.


Beta blockers work by affecting the circulation of blood within and outside the heart as it flows through the arteries and veins. Beta-blockers function by blocking the beta receptors present in the heart and other cells, preventing it from reacting to stress and making it more relaxed. Carvedilol is available in capsule and tablet forms, in various doses strengths.


Side Effects:

Mild Side Effects:

The following are some mild side effects that can be experienced by the user of the medicine upon initially administrating the drug.

  • Generalized swelling
  • Dizziness, light-headedness, or fainting
  • Allergy
  • Slow heartbeat
  • Shortness of breath
  • Chest pain, discomfort, tightness, or heaviness
  • Pain
  • Weight gain
  • Indigestion
  • Vomiting
  • Cough
  • Hypercholesterolemia
  • Headache
  • Diarrhea
  • Nausea
  • Skin rash



Severe Side Effects:

The following list entails some of the more severe and possibly fatal side effects of the drug. If experienced, one should directly get in touch with their doctor.

  • Skin rash
  • High blood pressure (hypertension)
  • Decreased exercise tolerance
  • Depression
  • Palpitations
  • Unexplained weight loss
  • Somnolence
  • Impotence
  • Bronchospasm
  • Abnormal lung sounds (rales)
  • Raynaud phenomenon
  • Insomnia
  • Urinary tract issues
  • Hallucinations
  • Liver damage (hepatotoxicity)
  • Insulin resistance
  • Nightmares
  • Seizures

The list does not contain all side effects. To get more information, get in touch with your doctor or pharmacist. You could also read the medical guide to get a better insight.


How to use:

Thoroughly read the medical guide that your pharmacist provides you and be sure to follow your doctor’s instructions while administering the drug. The medication can be taken twice a day, with or without food.

Do not increase or decrease the dose by yourself. Make sure you don’t cease the use of it without doctor’s instructions to do so.

The dosage depends on factors such as medical history, age, and response to treatment among others. Your doctor may begin the treatment by prescribing a lower dose and build it up eventually to see signs of allergy and also to monitor individual reaction to the drug.


This medicine does not work immediately and take approximately two weeks to begin showing results. If, despite using the drug for an appreciable span of time, blood pressure remains high or the readings rise, or any signs of heart failures such as shortness of breath are observed, one must immediately contact their doctors as it can have fatal repercussions.

The treatment is a part of a whole program for treatment of hypertension which works best when combined with healthy eating efforts, regular exercise, and weight control.



Don’t take this medicine if you are allergic to any of the ingredients used in the synthesis of the drug. Furthermore, people suffering from the following should not use the drug:

  • Bronchitis
  • Severe liver disease
  • Asthma
  • Serious heart conditions (e.g., sick sinus syndrome, slow heart rate, use of pacemaker)
  • Emphysema


Additionally, let your doctor know about all previous medical conditions to enable him to prescribe a healthy dose of the medicine. The conditions that are most common and of significance are:

  • Diabetes (use of Carvedilol will make it harder to tell hypoglycemia symptoms apart)
  • Thyroid disorder
  • Liver diseases
  • Kidney disease
  • Tumor of the adrenal gland
  • Angina
  • Raynaud’s syndrome

Its effects are unknown in pregnant women, and neither is there sufficient data to determine if the medicine passes to the baby via breast milk. Therefore, consult your doctor if you are expecting or planning on breastfeeding while on this medicine.