What is Tenormin and when should it be used?

Tenormin protects the heart from excessive stress. This reduces the work of the heart muscle and reduces the heart's response to physical and mental stress. Tenormin lowers too high blood pressure. Angina pectoris (very painful tightness in the chest, which can radiate into the left arm) occurs when the heart no longer receives enough oxygen during exertion. Tenormin prevents these attacks or decreases their frequency and intensity. Irregular heartbeat or increased pulsations due to illness or stress can be normalized with Tenormin.

Atenolol, the active substance in Tenormin, is part of a group of beta-blockers that act specifically on the heart. It lowers too high pressure and decreases cardiac activity, without influencing the muscles of the respiratory tract. Patients suffering from a respiratory condition (dyspnea, asthma) can therefore take Tenormin, with the usual precautions.

Your doctor will prescribe Tenormin:

- to reduce too high pressure (hypertension);
- to protect the heart muscle from overload (angina pectoris);
- to regulate heart rhythm disturbances;
- after myocardial infarction;
- to prevent a new heart attack.

When should Tenormin not be taken?

If you have any of the following diseases, you should not take Tenormin: if you have had an allergic reaction to Tenormin in the past, resp. the active substance atenolol, if you have heart disease such as heart weakness or heart block (pulse less than 50 per minute), if you have had a very slow or very irregular pulse, very low blood pressure or very poor blood supply in the past, in case you have been diagnosed with pheochromocytoma or after prolonged fasting. Tenormin is not indicated for the treatment of children.

What are the precautions when taking Tenormin?

Treatment with this drug requires regular medical control. Depending on the individual reaction, this drug may change the reaction capabilities in such a way that the ability to actively participate in road traffic, use machines or work without a safe support may be impaired. This is true to an increased extent at the beginning of treatment, when increasing dosage and changing treatment as well as in combination with alcohol.

Tell your doctor or pharmacist if you have asthma, breathing problems, blood breathing problems, heart problems, kidney conditions or thyroid conditions. Tell your doctor that you are taking other medicines such as disopyramide or amiodarone to correct heart beat irregularities, too high blood pressure or angina or heart failure or to calm pain. Talk to your doctor if you are using decongestant nasal sprays or cold medicines.

If you are taking clonidine due to high blood pressure or migraines, you should never stop clonidine or Tenormin on your own without consulting your doctor first.

Your pulse may slow down during treatment. This is a normal reaction to the active ingredient. Tell your doctor if your resting pulse drops below 50 beats per minute.

If you have diabetes and your blood sugar is often too low, or if you are taking other medicines at the same time, especially for the heart, be sure to tell your doctor about it.

Be aware that before any surgery, the anesthesiologist should know all the medications you are taking.

Please tell your doctor or pharmacist if

- you suffer from another disease - you are allergic – you are already taking other medicines (or are already using other medicines for external use) (even if you are self-medicating!).

Can Tenormin be taken during pregnancy or lactation?

You should not, if possible, take any medication during pregnancy or lactation. This precaution also applies to Tenormin. In special situations, your doctor may decide if and when Tenormin is indicated during pregnancy or breast-feeding.

How to use Tenormin?

Like any medicine, you should take Tenormin strictly following the prescriptions of your doctor. As a rule, the adult dose is 1 tablet of Tenormin mite or 1 tablet of Tenormin, 1 time per day. In patients with kidney disease with insufficient excretion, the doctor will adjust the dose accordingly. Swallow the tablets with a little liquid, without crunching, during or after a meal, preferably always at the same time of the day. If you forgot to take a tablet, take it as soon as you think about it. However, two tablets should not be taken at the same time. Too high and uncontrolled pressure can have dangerous consequences. In no case should the treatment be stopped abruptly, but very gradually, over a prolonged period. In order to enhance the effect of Tenormin in some situations, it is possible that your doctor will prescribe other medicines in addition. Make sure you always have a sufficient supply of your Tenormin tablets so that you do not have to interrupt your treatment.

The use and safety of Tenormin has not been established to date for children and adolescents.

Do not change the prescribed dosage on your own. Talk to your doctor or pharmacist if you feel that the effectiveness of the drug is too low or on the contrary too strong.

What side effects can Tenormin cause?

Taking Tenormin can cause the following side effects:

Common (affects 1 to 10 users in 100)

Fatigue, slowing of heartbeats, cold sensation in fingers and toes, nausea, vomiting and diarrhoea have been reported frequently.

Occasional (concerns 1 to 10 users out of 1000)

Occasionally, sleep disorders can be observed.

Rare (concerns 1 to 10 users out of 10’000)

Tiny skin or mucous membrane hemorrhages (purpura), confusion, dizziness, headache, mood swings, nightmares, psychotic state, hallucinations, tingling hands, impaired vision, dry eyes, worsening of blood circulation disorders, heart block (symptoms include irregular heartbeats, fatigue and dizziness when passing too quickly standing), worsening of heart failure, low blood pressure (which may be associated with syncope), worsening of respiratory disorders in asthmatics, dry mouth, worsening of psoriaris, skin rashes, hair loss, impotence and abnormal curvature of the penis are rare.

Contact your doctor immediately, if your resting pulse drops below 50 beats per minute or your blood pressure is too low. Like all drugs used to normalize the frequency of heartbeats, Tenormin can cause heart rhythm disturbances.

If you notice any side effects, please tell your doctor or pharmacist. This applies in particular to side effects not mentioned in this package leaflet.

What else should you pay attention to?

This medicinal product should not be used beyond the date after the words "EXP" on the container.

Storage notes

Store at room temperature (15-25 °C).

Store in the original packaging to protect from light and moisture.

Keep out of reach of children.

For more information, consult your doctor or pharmacist, who have detailed information for professionals.

What Tenormin contains?

Active ingredients

Tenormin: atenolol 100 mg tablets.
Tenormin mite: atenolol 50 mg tablets.
Tenormin submit: atenolol 25 mg tablets.


Tenormin: tablets with excipients.
Tenormin moth: tablets with excipients.
Tenormin submit: tablets with excipients.