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Atenolol (Tenormin)

No More Panic forum posts about this medication can be found here: Atenolol

Atenolol is a beta-adrenaceptor antagonist, or a more commonly known as a beta blocker. Its primary use in the population is to reduce blood pressure.

It is used effectively in patients with anxiety and panic as well and is especially helpful in the reduction of tremor, palpitations, racing/pounding heart beat and breathlessness.

Often used as a regularly medication in the acute phase of anxiety reducing to an ‘as required’ medication as recovery is made. No more than one dose to be taken at once. This medication reduces your heart rate and blood pressure.

Benefits Seen

  • Within the first few doses

If Stop Taking

  • Do not stop without consulting your doctor and never abruptly.

Overdose symptoms include

  • bradycardia
  • Cardiac conduction block
  • Hypotension
  • Cardiac failure
  • Cardiogenic shock
  • Convulsions
  • Coma
  • Respiratory depression
  • Broncho constriction can also infrequently occur.


Avoid excessive alcohol or binge drinking and other medicines, recreational drugs and herbs that slow your actions and reactions.

Use caution if you have lung disease. This includes asthma, chronic obstructive pulmonary disease, or if you are using an inhaler. Can cause wheezing or spasm in the lung.

Inform your doctor before taking

  • If you have an allergy to another beta-blocking agent, Atenolol, or any other part of the medicine.
  • If you are pregnant.
  • If you have a known cardiac condition
  • If you have a respiratory illness
  • If you are diabetic, use caution when low blood sugars are seen. This medicine hides signs of low blood sugar except sweating.
  • If you have Raynauds syndrome

Symptoms or Side Effects


  • Dizziness
  • Fatigue
  • Nausea
  • Slow heartbeat


  • Depression
  • Diarrheoa
  • Difficult or labored breathing
  • Dizziness upon standing up
  • Drowsiness
  • Headache
  • Heart failure
  • Impotence
  • Light-headedness
  • Low blood pressure
  • Penile deformity
  • Periods of poor circulation in the fingers
  • Psoriasis-like rash, red or purple spots on the skin
  • Rapid heartbeat
  • Slow heartbeat
  • Sluggishness
  • Temporary hair loss
  • Tiredness
  • Vertigo
  • Wheezing
  • Worsening of psoriasis

The most frequent and serious adverse effects of beta blockers is directly related to its ability to block beta receptors.

The most serious adverse effects are heart failure, heart block, and bronch spasm. Other more minor side-effects include fatigue and coldness of extremities. Reactions tend to be more severe after intravenous injection as opposed to oral administration.

  • Feeling sleepy or lightheaded. Avoid driving, doing other tasks or activities that require you to be alert until you see how this medicine affects you.
  • Dizziness is common. Rise slowly over several minutes from sitting or lying position. Be careful climbing stairs.
  • Change in sexual ability or desire. This can return to normal after medicine is stopped.
  • Slow heart rate (pulse) and/or low blood pressure. This may make you feel lightheaded, dizzy, weak, or tired.

See doctor immediately if you have any of the following:

  • Signs of a life-threatening reaction. These include wheezing; tightness in the chest; fever; itching; bad cough; blue skin color; fits; swelling of face, lips, tongue, or throat.
  • Too tired or sleepy.
  • Passing out, fainting, dizziness, or light headedness.
  • Chest pains, fast heartbeats, shortness of breath, or decreased ability to walk.
  • Any rash.