This causes blood vessels to relax. By relaxing the vessels, beta blockers help to lower blood pressure and reduce chest pain. Instead, they help to manage the symptoms. If these effects are mild, they may go away within a few days or a couple of weeks. Call your doctor right away if you have serious side effects.
Serious side effects and their symptoms can include the following:. Disclaimer: Our goal is to provide you with the most relevant and current information. However, because drugs affect each person differently, we can not guarantee that this information includes all possible side effects.
This information is not a substitute for medical advice. Always discuss possible side effects with a healthcare provider who knows your medical history. Atenolol oral tablet can interact with other medications, vitamins, or herbs you may be taking.
An interaction is when a substance changes the way a drug works. This can be harmful or prevent the drug from working well. To help avoid interactions, your doctor should manage all of your medications carefully. Reserpine and monamine oxidase inhibitors MAOIs may increase or add to the effects of atenolol.
They may also increase lightheadedness or slow your heart rate more. MAOIs can continue to interact with atenolol for up to 14 days after taking them. Examples of MAOIs include:. Taking certain heart drugs with atenolol can slow down your heart rate too much. Examples of these drugs include:.
Like atenolol, these drugs are used to treat high blood pressure and several other heart problems. If combined with atenolol, they may reduce the contractions of your heart and slow it down more. Doctors sometimes use this combination under close supervision. Alpha blockers lower blood pressure. They may decrease blood pressure too much when combined with atenolol.
Suddenly stopping the drug while also taking atenolol can cause a big jump in blood pressure. Taking indomethacin with atenolol can reduce the blood pressure-lowering effects of atenolol. However, because drugs interact differently in each person, we can not guarantee that this information includes all possible interactions. Always speak with your healthcare provider about possible interactions with all prescription drugs, vitamins, herbs and supplements, and over-the-counter drugs that you are taking.
Taking it again could be fatal cause death. A doctor may still prescribe it, but only in small doses with careful monitoring. Atenolol works to block beta receptors on cells in the heart. But at higher doses, atenolol can block different types of beta receptors found in breathing passages.
Blocking these receptors can lead to narrowing of breathing passages, making asthma or COPD worse. For people with diabetes: Atenolol may mask important signs of low blood sugar, including shaking and increased heart rate. Without these signals, it becomes more difficult to recognize dangerously low blood sugar levels.
For people with poor circulation: If you have poor circulation in your feet and hands, you may have worse symptoms when taking atenolol. Atenolol reduces blood pressure, so you might not get as much blood to your hands and feet. For people with an overactive thyroid hyperthyroidism : Atenolol may mask important signs of an overactive thyroid, including a fast heartbeat.
If you stop taking this drug suddenly, it may get worse and could be life threatening. For pregnant women: Atenolol is a category D pregnancy drug. That means two things:. Atenolol use in the second trimester of pregnancy has been associated with birth of babies who are smaller than normal. Also, newborns of mothers who took atenolol at the time of birth may be at risk of hypoglycemia lower than normal blood sugar levels and bradycardia slower than normal heartbeat.
If you take atenolol and are considering having a baby, or if you are pregnant, talk to your doctor right away. Atenolol is not the only medication that treats high blood pressure. Other drugs have fewer adverse effects during pregnancy and breastfeeding. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so.
The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.
If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses. Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light.
Keep from freezing. It is very important that your doctor check your progress at regular visits to make sure this medicine is working properly and to check for unwanted effects.
Using this medicine while you are pregnant can harm your unborn baby. Use an effective form of birth control to keep from getting pregnant. If you think you have become pregnant while using the medicine, tell your doctor right away. Make sure any doctor or dentist who treats you knows that you are using this medicine. You may need to stop using this medicine several days before having surgery. Atenolol may cause heart failure in some patients. Check with your doctor right away if you are having chest pain or discomfort; dilated neck veins; extreme fatigue; irregular breathing; an irregular heartbeat; shortness of breath; swelling of the face, fingers, feet, or lower legs; weight gain; or wheezing.
This medicine may cause changes in your blood sugar levels. Also, this medicine may cover up signs of low blood sugar, such as a rapid pulse rate. Check with your doctor if you have these problems or if you notice a change in the results of your blood or urine sugar tests. This medicine may cause some people to become less alert than they are normally. If this side effect occurs, do not drive, use machines, or do anything else that could be dangerous if you are not alert while taking atenolol.
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention. Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.
Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:. Other side effects not listed may also occur in some patients. Atenolol, like many other beta-blockers, is typically used to treat hypertension.
It is often used to treat other heart or cardiovascular conditions as well, such as arrhythmia, migraines, and chest pain. With nearly 20 million prescriptions annually, atenolol is consistently one of the most prescribed medications in the US.
The content on this page is provided for informational purposes only. If you have any questions or concerns about your treatment, you should talk to your doctor, pharmacist, or healthcare professional. This is particularly important if you are taking multiple medications or have any existing medical conditions. Atenolol works similarly to other beta-blockers , working to slow down your heart rate.
Through a slowed heart rate and by changing how the heart responds to nerve impulses, atenolol enables the heart to pump blood easier. Even though atenolol is used to treat migraines, it's exact mechanism is unknown. Atenolol may help to reduce activity in the visual cortex, a part of the brain where migraines begin.
Patients prescribed atenolol often wonder how long it will take before they begin to see positive results. Fortunately, atenolol typically begins reducing blood pressure within about 3 hours of taking it. The right time to take atenolol may vary between patients and can depend on how many doses you need to take each day. If you are taking only one dose per day, your doctor may recommend that you take atenolol before bed.
This is because it may cause dizziness. After you understand how atenolol affects you personally you may wish to take your dose in the morning. If you are taking two doses per day, your doctor will likely recommend taking one in the morning when you wake up and once before bed.
It is not recommended that you stop taking atenolol without weaning off. If you need to stop taking atenolol you must speak with your doctor.
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