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You should not use this medication if you are allergic to atenolol (Tenormin) or chlorthalidone (Hygroton, Thalitone), or if you have:
If you have certain conditions, you may need a dose adjustment or special tests to safely take this medication. Before you take atenolol and chlorthalidone, tell your doctor if you are allergic to any drugs, or if you have:
FDA pregnancy category D. Do not use atenolol and chlorthalidone without telling your doctor if you are pregnant. It could harm the unborn baby. Use effective birth control, and tell your doctor if you become pregnant during treatment.
Atenolol and chlorthalidone can pass into breast milk and may harm a nursing baby. Do not use this medication without telling your doctor if you are breast-feeding a baby.
Take this medication exactly as it was prescribed for you. Do not take the medication in larger amounts, or take it for longer than recommended by your doctor. Follow the directions on your prescription label.
Atenolol and chlorthalidone is only part of a complete program of treatment for hypertension that may also include diet, exercise, and weight control. Follow your diet, medication, and exercise routines very closely if you are being treated for hypertension.
Keep using this medication even if you feel fine. High blood pressure often has no symptoms. You may need to use blood pressure medication for the rest of your life.
To be sure this medication is not causing harmful effects, your blood and blood pressure will need to be tested on a regular basis. Do not miss any scheduled appointments.
If you need to have any type of surgery, tell the surgeon ahead of time that you are using atenolol and chlorthalidone.
Call your doctor if you have ongoing vomiting or diarrhea, or if you are sweating more than usual. You can easily become dehydrated while taking this medication, which can lead to severely low blood pressure or a serious electrolyte imbalance.
This medication can cause you to have unusual results with certain medical tests. Tell any doctor who treats you that you are using atenolol and chlorthalidone.
Do not stop taking atenolol and chlorthalidone without the advice of your doctor. Stopping suddenly may make your condition worse or cause withdrawal symptoms.
If you do stop taking this medication for any reason, limit your physical activity to prevent heart problems. Your doctor may recommend that you start taking the medication again if you have withdrawal symptoms.
Store atenolol and chlorthalidone at room temperature away from moisture, heat, and light.
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
Get tips on handling your hypertension.