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Atenolol

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Common known side effects

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.

Check with your doctor immediately if any of the following side effects occur:

More common

- Blurred vision- cold hands or feet- confusion- difficult or labored breathing- dizziness, faintness, or lightheadedness when getting up from a lying or sitting position suddenly- shortness of breath- sweating- tightness in chest- unusual tiredness or weakness- wheezing

Less common

- Anxiety- chest pain or discomfort- chills- cold sweats- cough- dizziness or lightheadedness- fainting- fast heartbeat- leg pain- noisy breathing- slow or irregular heartbeat- sudden shortness of breath or troubled breathing

Rare

- Bloody urine- decreased frequency or amount of urine- increased blood pressure- increased thirst- loss of appetite- lower back or side pain- nausea- swelling of face, fingers, or lower legs- vomiting- weight gain

Incidence not determined

- Black, tarry stools- bleeding gums- blood in urine or stools- blurred or loss of vision- bone or joint pain- disturbed color perception- double vision- feeling that others are watching you or controlling your behavior- feeling that others can hear your thoughts- feeling, seeing, or hearing things that are not there- fever- halos around lights- night blindness- overbright appearance of lights- paleness or cold feeling in fingertips and toes- pinpoint red or purple spots on skin- severe mood or mental changes- skin irritation or rash, including rash that looks like psoriasis- skin rash, hives, or itching- sore throat- swollen or painful glands- tingling or pain in fingers or toes when exposed to cold- tunnel vision- unusual behavior- unusual bleeding or bruising

Get emergency help immediately if any of the following symptoms of overdose occur:

Symptoms of overdose

- Anxiety- coma- cool, pale skin- depression- dilated neck veins- extreme fatigue- headache- increased hunger- irregular breathing- nervousness- nightmares- seizures- shakiness- slurred speech- unusual drowsiness, dullness, tiredness, weakness, or feeling of sluggishness

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:

More common

- Discouragement- feeling sad or empty- irritability- lack of appetite- loss of interest or pleasure- trouble concentrating- trouble sleeping

Less common

- Diarrhea- dream activity- feeling of constant movement of self or surroundings- sensation of spinning- sleepiness

Incidence not determined

- Decreased interest in sexual intercourse- dry mouth- inability to have or keep an erection- loss in sexual ability, desire, drive, or performance- loss of hair, temporary- pain of penis on erection

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.