During a follow-up visit, a patient who has been on estrogen therapy admits that she has continued to smoke cigarettes. The nurse will remind the patient that smoking while on estrogen may lead to increased:

Choice A reason: This is incorrect because insulin can be given intravenously in certain situations, such as diabetic ketoacidosis, hyperglycemic hyperosmolar state, or perioperative care.

Choice B reason: This is correct because regular insulin is the only type of insulin that can be administered intravenously, as it is a short-acting insulin that has a rapid onset and peak. Other types of insulin, such as intermediate-acting or long-acting, are not suitable for intravenous use, as they have a delayed onset and peak and may cause hypoglycemia.

Choice C reason: This is incorrect because insulin aspart and insulin lispro are rapid-acting insulins that have a faster onset and peak than regular insulin. They are not recommended for intravenous use, as they may cause severe hypoglycemia. They are usually given subcutaneously before meals to control postprandial blood glucose levels.

Choice D reason: This is incorrect because not all forms of insulin can be administered intravenously, as explained above. Only regular insulin can be given intravenously, and the dose may differ from the subcutaneous dose depending on the patient's blood glucose level and insulin sensitivity.

Choice A reason: This is incorrect because constipation is not a common or serious adverse effect of antihistamines. However, the patient should increase their fluid and fiber intake and exercise regularly to prevent constipation.

Choice B reason: This is incorrect because abdominal cramps are not a common or serious adverse effect of antihistamines. However, the patient should avoid spicy or fatty foods and take the antihistamine with food or milk to prevent stomach irritation.

Choice C reason: This is correct because drowsiness is one of the most common and bothersome adverse effects of antihistamines. The patient should avoid driving or operating machinery if they experience drowsiness and take the antihistamine at bedtime.

Choice D reason: This is incorrect because decreased libido is not a common or serious adverse effect of antihistamines. However, the patient should inform their provider if they experience any sexual dysfunction or mood changes while taking the antihistamine.