Doctors may prescribe the drug with the brand name Apo-Atenidone in Canada to treat high blood pressure, also known as hypertension. The medication contains a combination of chlorthalidone and atenolol. Chlorthalidone, a diuretic, works to decrease the level of fluid in the body through increased urine output. Atenolol, a beta-blocker, changes the way nerve impulses affect the heart. Together, the two medicines in Apo-Atenidone help control blood pressure.
Breathing Problems
The most common serious side effects associated with Apo-Atenidone include breathing problems. MayoClinic.com states the combination of chlorthalidone and atenolol can make it difficult for the person to breathe properly, sometimes resulting in a struggle to get breath. The medicine can cause shortness of breath as well as a feeling of tightness in the chest. The person also may wheeze, meaning he produces a whistling sound upon exhalation. Because these all indicate serious health problems, MayoClinic.com recommends immediate consultation with a physician.
Cold Extremities
The only common serious side effect of Apo-Atenidone that does not affect breathing is a feeling of coldness in the legs and arms. Because of the diuretic effects of the medication, body fluids are diminished. This can cause a decrease in blood flow beyond what doctors expect when prescribing the medication and classifies as serious. MayoClinic.com also recommends immediate medical aid for this side effect.
Psychological Side Effects
Although not classified as serious, some common side effects of taking Apo-Atenidone can affect the mental state of the person. During the start of treatment, the person may feel emotionally empty and sad. She may feel discouraged in her everyday life, and may lose her normal level of interest and no longer feel pleasure from enjoyable activities. She also may feel irritable and find it difficult to concentrate. These kinds of side effects, MayoClinic.com states, generally cease as the person's body adjusts to the medication. If symptoms persist or worsen, a doctor should be consulted.
Appetite Problems and Insomnia
The combination of chlorthalidone and atenolol can produce other non-serious and temporary side effects. For example, the medicine can cause loss of appetite. It also can make it difficult to fall asleep or stay asleep. Conversely, the medication can make the user feel unusually tired because of the decrease in blood pressure. None of these classify as serious problems and should resolve without medical help.
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