A nurse is obtaining a medication history from a client who reports taking 1 oz of magnesium hydroxide daily as a laxative. The nurse should identify that this dose equates to how many mL?
(Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

Choice A reason: Using a soft bristled tooth brush can prevent gum bleeding and irritation that may occur with a hard bristled tooth brush. Gum bleeding can be a sign of excessive anticoagulation and increased risk of bleeding.

Choice B reason: Reporting black or bloody bowel movements is important because it can indicate gastrointestinal bleeding, which can be a serious complication of warfarin therapy. Gastrointestinal bleeding can cause anemia, shock, and even death if not treated promptly.

Choice C reason: Limiting all fruits and vegetables is not necessary for a client taking warfarin. However, some fruits and vegetables, especially those that are high in vitamin K, can interfere with the effect of warfarin and increase the risk of clotting. Vitamin K is found in green leafy vegetables, such as spinach, kale, broccoli, and cabbage, and some fruits, such as avocado, kiwi, and grapes. The client should maintain a consistent intake of vitamin K and avoid sudden changes in their diet.

Choice D reason: Reporting coffee ground or bloody emesis is also important because it can indicate upper gastrointestinal bleeding, which can be another serious complication of warfarin therapy. Upper gastrointestinal bleeding can cause hematemesis, melena, anemia, and hypovolemic shock.

Choice E reason: Shaving with an electric razor instead of a razor blade can prevent skin cuts and bleeding that may occur with a razor blade. Skin cuts and bleeding can be a sign of excessive anticoagulation and increased risk of bleeding.

Choice A reason: This is incorrect because labetalol is a safe and effective medication for treating hypertension in pregnancy. Labetalol is a beta-blocker that lowers blood pressure by reducing the heart rate and the force of contraction. It does not affect the blood flow to the placenta or the fetus.

Choice B reason: This is incorrect because labetalol is not contraindicated for smokers. However, smoking is a risk factor for cardiovascular disease and should be discouraged by the nurse. Smoking can increase blood pressure, heart rate, and the risk of blood clots.

Choice C reason: This is correct because labetalol is contraindicated for clients with a history of uncontrolled asthma. Labetalol is a non-selective beta-blocker that can block the beta-2 receptors in the lungs and cause bronchoconstriction. This can worsen asthma symptoms and trigger an asthma attack.

Choice D reason: This is incorrect because labetalol is a suitable medication for clients who had a myocardial infarction. Labetalol can prevent further damage to the heart muscle by reducing the oxygen demand and the workload of the heart. It can also prevent arrhythmias and angina.