A patient who has been on long-term corticosteroid therapy has had surgery to correct an abdominal hernia. The nurse keeps in mind that which potential effect of this medication may have the most impact on the patient's recovery?

Choice A reason: This is incorrect because reporting symptoms that last longer than 2 days is not specific to guaifenesin. This is a general instruction for any patient with a sinus infection, regardless of the medication they are taking.

Choice B reason: This is incorrect because reporting clear-colored sputum to the prescriber is not necessary. Clear-colored sputum indicates that the infection is improving and the mucus is thinning. This is a desired effect of guaifenesin, not a problem that needs to be reported.

Choice C reason: This is incorrect because guaifenesin does not have sedating effects. Guaifenesin is an expectorant that helps to break up and expel mucus from the respiratory tract. It does not cause drowsiness or impair the ability to drive or operate machinery.

Choice D reason: This is correct because increasing fluid intake is an important instruction for a patient taking guaifenesin. Fluids help to hydrate the body and thin the mucus, making it easier to cough up and clear the sinuses. Fluids also help to prevent dehydration and dryness of the mucous membranes.

Choice A reason: Constipation is not an adverse effect of tamoxifen. Tamoxifen does not affect the gastrointestinal motility or function. Constipation may be caused by other factors such as dehydration, low-fiber diet, or lack of exercise.

Choice B reason: Clotting is an adverse effect of tamoxifen. Tamoxifen can increase the risk of thromboembolic events such as deep vein thrombosis, pulmonary embolism, or stroke. Clotting can cause serious complications such as pain, swelling, shortness of breath, chest pain, or neurological deficits.

Choice C reason: Tinnitus is not an adverse effect of tamoxifen. Tamoxifen does not affect the auditory system or cause hearing loss. Tinnitus may be caused by other factors such as noise exposure, ear infection, or medication toxicity.

Choice D reason: Urinary retention is not an adverse effect of tamoxifen. Tamoxifen does not affect the urinary system or cause bladder dysfunction. Urinary retention may be caused by other factors such as prostate enlargement, nerve damage, or medication side effects.