A nurse is caring for a client who has developed agranulocytosis as a result of taking propylthiouracil to treat hyperthyroidism. The nurse should understand that this client is at increased risk for which of the following conditions?

Choice A reason: Taking this medication with food is not necessary, as lisinopril can be taken with or without food. Food does not affect the absorption or effectiveness of lisinopril.

Choice B reason: Facial swelling is not an expected effect of this medication, but a serious adverse reaction that indicates angioedema. Angioedema is a life-threatening condition that causes swelling of the face, tongue, throat, and airway. It requires immediate medical attention and discontinuation of lisinopril.

Choice C reason: Reporting a cough to the provider is an important instruction, as a cough is a common and annoying side effect of lisinopril. Lisinopril belongs to the class of angiotensin-converting enzyme (ACE) inhibitors, which can cause a dry, persistent, nonproductive cough. The cough may interfere with the client's quality of life and adherence to the medication. The provider may prescribe an alternative medication, such as an angiotensin II receptor blocker (ARB), to avoid the cough.

Choice D reason: Increasing the intake of potassium-rich foods is not advisable, as lisinopril can cause hyperkalemia (high potassium levels) due to decreased potassium excretion in the urine. Clients should monitor their potassium levels and avoid excessive intake of potassium supplements or foods, such as bananas, oranges, potatoes, and tomatoes.

Choice A reason: Using an electric razor while on warfarin is the correct instruction. Warfarin is an anticoagulant that inhibits the formation of blood clots and prolongs the bleeding time. Using an electric razor can reduce the risk of cuts and bleeding while shaving. The client should avoid using sharp objects or instruments that can cause injury or trauma.

Choice B reason: Doubling the dose of warfarin if a dose is missed is not the correct instruction. This is a dangerous and potentially fatal advice, as it can cause overdose and severe bleeding. The client should take the missed dose as soon as possible, unless it is close to the next scheduled dose, in which case the client should skip the missed dose and resume the regular dosing schedule. The client should never take extra doses or change the dose without consulting the provider.

Choice C reason: Mild nosebleeds being common during initial treatment is not the correct instruction. This is a false and misleading statement, as nosebleeds are not a normal or expected side effect of warfarin therapy. Nosebleeds can indicate bleeding problems or complications, such as thrombocytopenia, which is a low platelet count. The client should report any nosebleeds or other signs of bleeding, such as bruising, petechiae, hematuria, or melena, to the provider immediately.

Choice D reason: Increasing fiber intake to reduce the adverse effect of constipation is not the correct instruction. This is an irrelevant and unnecessary recommendation, as constipation is not a common or serious adverse effect of warfarin therapy. Constipation can be caused by many factors, such as diet, hydration, activity, or medication. The client should maintain a balanced and consistent diet, drink plenty of fluids, and exercise regularly to prevent constipation. The client should also avoid foods that are high in vitamin K, such as green leafy vegetables, as they can interfere with the effect of warfarin.