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Tenormin is prescribed to the patients having high blood pressure (hypertension). It is also used for the treatment of chest pains (stenocardia) during heart ischemic disease. Tenormin is useful as well for slowing and regulating of tachycardia specific types. It is also used for the prevention of migraine and some tremor types treatment (inherited tremor).

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Exp. Date: November 2022
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  • Safety information
  • Side effects
  • Drug title

    Tenormin (Atenolol)

    Usage indications

    Tenormin is prescribed to the patients having high blood pressure (hypertension). It is also used for the treatment of chest pains (stenocardia)  during  heart ischemic disease. Tenormin is useful as well for slowing and regulating of tachycardia specific types. It is also used for the prevention of migraine and some tremor types treatment (inherited tremor).

    Application mode

    This drug should be taken before meal and sleep.

    Drug class and mechanism of action

    Tenormin is beta andrenergic blocker.  Termormin blocks the action of sympathetic nerve system, part of vegetative nerve system. Sympathetic nerve system stimulates heart beat temp. By blocking the action of these nerves, Tenormin decreases heart beat  frequency and is useful for heart beat abnormally quick temp. Tenormin decreases as well muscle contractions frequency and blood pressure level. Tenormin decreases the necessity of oxygen for heart muscle due to the decrease of heart beat frequency and the force of muscle contractions. Tenormin is useful for stenocardia treatment as it arises when heart  oxygen supply is lower than the demand.

    Missed doses

    If you miss a dose of Tenormin then you may take it as soon as you remember and adjust the remaining doses accordingly. However, if it is nearly time for the next dose then you may skip this dose and continue with the regular dosage. Do not take a double dose to make up for the missed dose.


    Some of the typical symptoms of a Tenormin overdose include breathing problems, chest pain, fainting, pounding in the chest, seizures, severe dizziness, severe weakness, very slow heartbeat, wheezing. You may need to seek medical attention immediately.


    Store drug at room temperature at tightly closed container.

    Warning / Precautions

    Discuss with your doctor about any prior medical condition that you may have including allergies to medicines, food or other substances, if you have a history of lung or breathing problems (eg, asthma, chronic bronchitis, chronic obstructive pulmonary disease [COPD], emphysema), heart problems (eg, heart failure, conduction problems, left ventricle problems), blood vessel problems, diabetes, kidney problems, an adrenal gland tumor, or an overactive thyroid.

    may cause drowsiness. These effects get aggravated if you take it with alcohol or certain other medications (sleep aids, muscle relaxers). So, do not drive or perform other potentially hazardous tasks until you know how your body reacts to the drug.

    You must not take if you are allergic to any ingredient in it or have a very slow heartbeat, heart block, uncontrolled heart failure, shock caused by serious heart problems, or low blood pressure after a heart attack, have an untreated adrenal gland tumor (pheochromocytoma) or you are taking mibefradil.

    If you are pregnant or suspect that you are, then stop using Terormin and contact your doctor immediately.

    It is unknown whether Tenormin is secreted in breast milk. Avoid breast feeding while using the drug.

    Certain drugs can interact with Tenormin and hence, mention clearly to your doctor or pharmacist all medicines, dietary supplements and herbal prescriptions that you are taking.

    Tenormin may reduce the amount of blood that flows to your feet and hands. This may cause them to feel cold and make you more sensitive to the cold. Dress warmly in cold weather. Be careful when you are out in the cold for long periods of time.
    Patients who start therapy with blood pressure medication are known to feel tired in the first few weeks. Continue to take your medication even if this happens.

    Tenormin may affect your blood sugar level and hide the symptoms like a rapid heartbeat. Monitor your blood sugar levels closely and contact your doctor immediately if these symptoms occur.

    Tenormin should be used with extreme caution in children as the safety and effectiveness of the drug have not been confirmed yet.

    Ensure that you inform your doctor and your dentist about Tenormin before receiving any form of medical treatment or dental treatment or emergency surgery.

    Periodic lab tests (blood pressure, blood sugar and pulse) may be recommended to monitor your health while taking the drug. Ensure that you do not miss any lab tests.

    Possible side effects

    Some of the common side effects of are cold fingers and toes, diarrhea, dizziness, drowsiness, nausea, tiredness or weakness. Please contact your doctor if the symptoms persist or become bothersome.

    Other severe side effects include allergic reactions (rash, hives, difficulty breathing, tightness in the chest, swelling of the mouth, face, lips, or tongue), blue fingernails, toenails, or palms, decreased sexual ability, fainting, mental or mood problems, persistent dizziness or lightheadedness, shortness of breath, sudden, unusual weight gain, swelling of hands, ankles, or feet, unusual bruising or bleeding, unusually slow heartbeat.

    You must seek medical attention immediately if any of these side effects occur.

    Additional information

    Mind doing regular check of blood pressure and heart beat frequency on your doctor recommendation. Contact your pharmaceutist or doctor if you do not know how to check blood pressure and  pulse. Some life style changes might help you to decrease blood pressure. Consult your doctor on appropriate diet and physical exercises which might be useful for you.

    Do not share this drug with anyone else. Do not use this drug for other diseases treatment. Keep this drug away from children. Have some store of this drug if you have to take within long period of time.

    I appreciate your individual approach to the client and quick servicing. All I can wish you is to go forward not to stop at existing successes and stay as cool as you are now.
    - Dennis Euler.

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    Why Generic?

    Generic is a drug that has proven pharmaceutical, biological, and therapeutic equivalence to the brand name drug. In other words, generic has an absolutely identical content, dosage form and has the same qualities of effectiveness and safety as its branded analog.

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