Tenormin

DRUG DESCRIPTION

TENORMIN® (atenolol), a synthetic, beta1-selective (cardioselective) adrenoreceptor blocking agent, may be chemically described as benzeneacetamide, 4 -[2'-hydroxy-3'-[(1- methylethyl) amino] propoxy]-. The molecular and structural formulas are:

TENORMIN® (atenolol) structural formula illustration

C14H22N2O3

Atenolol (free base) has a molecular weight of 266. It is a relatively polar hydrophilic compound with a water solubility of 26.5 mg/ mL at 37°C and a log partition coefficient (octanol/water) of 0.23. It is freely soluble in 1N HCl (300 mg/mL at 25°C) and less soluble in chloroform (3 mg/mL at 25°C).

TENORMIN (atenolol tablets) is available as 25, 50 and 100 mg tablets for oral administration.

Inactive Ingredients: Magnesium stearate, microcrystalline cellulose, povidone, sodium starch glycolate.

What are the possible side effects of atenolol (Tenormin)?

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 any of these serious side effects:

  • slow or uneven heartbeats;
  • feeling light-headed, fainting;
  • feeling short of breath, even with mild exertion;
  • swelling of your ankles or feet;
  • nausea, stomach pain, low fever, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the...

Read All Potential Side Effects and See Pictures of Tenormin »

What are the precautions when taking atenolol tablets (Tenormin )?

Before taking atenolol, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: certain types of heart rhythm problems (such as slow heartbeat, second- or third-degree atrioventricular block), breathing problems (such as asthma, chronic bronchitis, emphysema), blood circulation problems (such as Raynaud's disease, peripheral vascular disease), kidney disease, serious allergic reactions including those needing treatment with epinephrine, mental/mood disorders (such as depression), a certain muscle disease...

Read All Potential Precautions of Tenormin »


Tenormin Consumer (continued)

SIDE EFFECTS: See also Warning and Precautions sections.

Dizziness, lightheadedness, tiredness, and nausea may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.

To reduce the risk of dizziness and lightheadedness, get up slowly when rising from a sitting or lying position.

This drug may reduce blood flow to your hands and feet, causing them to feel cold. Smoking may worsen this effect. Dress warmly and avoid tobacco use.

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: very slow heartbeat, severe dizziness, fainting, trouble breathing, blue fingers/toes, mental/mood changes (such as confusion, mood swings, depression).

Although this medication may be used to treat heart failure, some people may rarely develop new or worsening symptoms of heart failure. Tell your doctor right away if you experience any of these unlikely but serious side effects: swelling ankles/feet, severe tiredness, shortness of breath, unexplained/sudden weight gain.

A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any of the following symptoms of a serious allergic reaction: 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.

PRECAUTIONS: Before taking atenolol, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: certain types of heart rhythm problems (such as slow heartbeat, second- or third-degree atrioventricular block), breathing problems (such as asthma, chronic bronchitis, emphysema), blood circulation problems (such as Raynaud's disease, peripheral vascular disease), kidney disease, serious allergic reactions including those needing treatment with epinephrine, mental/mood disorders (such as depression), a certain muscle disease (myasthenia gravis).

This drug may make you dizzy. Do not drive, use machinery, or do any activity that requires alertness until you are sure you can perform such activities safely. Limit alcoholic beverages.

Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).

If you have diabetes, this product may prevent the fast/pounding heartbeat you would usually feel when your blood sugar level falls too low (hypoglycemia). Other symptoms of low blood sugar, such as dizziness and sweating, are unaffected by this drug. This product may also make it harder to control your blood sugar levels. Check your blood sugar levels regularly as directed by your doctor. Tell your doctor immediately if you have symptoms of high blood sugar such as increased thirst/urination. Your doctor may need to adjust your diabetes medication, exercise program, or diet.

During pregnancy, this medication should be used only when clearly needed. It may harm an unborn baby. Discuss the risks and benefits with your doctor.

This medication passes into breast milk and may have undesirable effects on a nursing infant. Consult your doctor before breast-feeding.


Tenormin Patient Information Including Side Effects

Brand Names: Tenormin

Generic Name: atenolol (Pronunciation: ah TEN oh lol)

  • What is atenolol (Tenormin)?
  • What are the possible side effects of atenolol (Tenormin)?
  • What is the most important information I should know about atenolol (Tenormin)?
  • What should I discuss with my healthcare provider before taking atenolol (Tenormin)?
  • How should I take atenolol (Tenormin)?
  • What happens if I miss a dose (Tenormin)?
  • What happens if I overdose (Tenormin)?
  • What should I avoid while taking atenolol (Tenormin)?
  • What other drugs will affect atenolol (Tenormin)?
  • Where can I get more information?

What is atenolol (Tenormin)?

Atenolol is in a group of drugs called beta-blockers. Beta-blockers affect the heart and circulation (blood flow through arteries and veins).

Atenolol is used to treat angina (chest pain) and hypertension (high blood pressure). It is also used to treat or prevent heart attack.

Atenolol may also be used for purposes other than those listed in this medication guide.

What are the possible side effects of atenolol (Tenormin)?

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 any of these serious side effects:

  • slow or uneven heartbeats;
  • feeling light-headed, fainting;
  • feeling short of breath, even with mild exertion;
  • swelling of your ankles or feet;
  • nausea, stomach pain, low fever, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes);
  • depression; or
  • cold feeling in your hands and feet.

Less serious side effects may include:

  • decreased sex drive, impotence, or difficulty having an orgasm;
  • sleep problems (insomnia);
  • tired feeling; or
  • anxiety, nervousness.

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.

What is the most important information I should know about atenolol (Tenormin)?

Do not stop taking atenolol without first talking to your doctor. Stopping suddenly may make your condition worse.

If you need to have any type of surgery, you may need to temporarily stop using atenolol. Be sure the surgeon knows ahead of time that you are using atenolol.

Atenolol can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert.

Avoid drinking alcohol, which could increase drowsiness and dizziness while you are taking atenolol.

Atenolol is only part of a complete program of treatment for hypertension that may also include diet, exercise, and weight control. Follow your diet, medication, and exercise routines very closely if you are being treated for hypertension.

If you are being treated for high blood pressure, keep using this medication even if you feel fine. High blood pressure often has no symptoms. You may need to use blood pressure medication for the rest of your life.

Store atenolol at room temperature away from moisture and heat.

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