|Atenolol-Chlorthalidone||100-25 mg||90 tablets||$65.00|
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Written by Dr Kim Langdon, MD
Information last reviewed 06/21/19
Atenolol (Tenormin) is used to lower blood pressure, but it can also be used for other conditions, such as angina. Atenolol is a type of antihypertensive (high blood pressure drug), known as a beta-blocker. This means that it works by relaxing and widening the blood vessels, this improves the blood flow and reduces your blood pressure.
Atenolol is one of the beta-blockers available to treat high blood pressure and coronary artery disease.
Atenolol works as a beta-blocker, meaning that it blocks the beta receptors on the blood vessels which causes the blood vessels to dilate, therefore reducing blood pressure.
Atenolol starts to work about 1 hour after taking it. The peak effect is between 2 to 4 hours, the effects can last between 12 to 24 hours.
Atenolol can be effective in reducing blood pressure. It is not the first line treatment. Sometimes, doctors may prescribe Atenolol not only for the blood pressure effect, but also for cardiac (heart) effect in people with coronary artery disease.
The active ingredient in Atenolol is atenolol, a type of beta-blocker. Beta-blockers work by blocking the body’s response to adrenaline. Adrenaline normally results in the constriction (narrowing) of the blood vessels, so by blocking this mechanism, the blood vessels are better able to relax and widen, reducing your blood pressure and improving blood flow around the body.
Atenolol blocks the response to beta-adrenergic stimulation. This type of stimulation results in the constriction of blood vessels. It selectively blocks beta1-receptors with little effect on beta2-receptors. Black Box Warning: Do not stop abruptly.
In addition to Atenolol, the inactive ingredients are:
Magnesium stearate, maize starch, sodium lauryl sulphate, colloidal anhydrous silica, sodium starch glycollate, magnesium carbonate, hypromellose, macrogol 6000, titanium dioxide, purified talc
Atenolol only causes a severe allergic reaction in rare cases. Unless you are specifically allergic to any of the active or inactive ingredients in atenolol, the drug should be safe for you. If it is your first time taking atenolol, look out for these signs of a severe allergic reaction: hives, difficulty breathing, swelling of the lips/face and dizziness. If you experience any of these please get medical help as soon as possible.
The correct dosage of Atenolol can vary from person to person, but it also depends upon which condition is being treated.
As an oral tablet, Atenolol is available in 25mg, 50mg and 100mg strength tablets. If you require a stronger dose, your doctor may tell you to take more than one tablet a day.
Atenolol can be taken with or without food, and is typically taken once a day.
If you are within 12 hours of the time your dose would be due, take the missed dose. However if more than 12 hours have gone by and it is almost time for your next dose, just take the next dose and do not double up the dose that you missed.
Common side effects, affecting more than 10% of people are:
Uncommon side effects, affecting between 1-10% of people are:
If you experience any allergic symptoms, including diffculty breathing, you should seek emergency medical attention.
Atenolol can interact negatively with a range of other drugs. It is important that you always let the prescribing physician know if you are taking any other medications, especially those with a known Atenolol interaction listed below:
The following conditions are contraindicated for Atenolol:
You should tell the prescribing physician if you experience any of the following.
Atenolol has more blood pressure lowering effects than metoprolol. Doctors may prescribe metoprolol for other reasons, such as fast heart rates.
Atenolol is not the only beta-blocker. Other beta-blockers include:
There is no problem with exercising while taking atenolol, however atenolol can slow down the heart rate and prevent your heart from spitting up during exercise which may limit your ability to exercise or make you feel tired or fatigued or lightheaded. You should speak with your doctor about whether atenolol is the right medication for you if you are an active exerciser.
The reason that you should not take atenolol if you have severe asthma is because beta-blockers can cause constriction of the airways, which can worsen asthma or cause an asthma exacerbation.
Disclaimer: This is not medical advice. You and your physician will determine if and how you should take any medication prescribed to you following a medical consultation.
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