A nurse is providing discharge instructions to a client who has asthma and is about to start taking theophylline (Theo-24). The nurse should tell the client that this medication might cause which of the following adverse effects?
Tachycardia
Drowsiness
Constipation
Oliguria
The Correct Answer is A
Choice A reason: Tachycardia is a possible adverse effect of theophylline, as it is a methylxanthine that stimulates the central nervous system and the cardiac muscle. The nurse should instruct the client to monitor their pulse rate and report any palpitations, chest pain, or irregular heartbeat.

Choice B reason: Drowsiness is not a likely adverse effect of theophylline, as it is a stimulant that increases alertness and energy. The nurse should caution the client to avoid taking the medication close to bedtime, as it may cause insomnia.
Choice C reason: Constipation is not a common adverse effect of theophylline, as it does not affect the gastrointestinal motility or secretion. The nurse should advise the client to maintain a balanced diet, adequate fluid intake, and regular exercise to prevent constipation.
Choice D reason: Oliguria is not a typical adverse effect of theophylline, as it does not impair the renal function or cause fluid retention. The nurse should encourage the client to drink enough fluids to prevent dehydration and maintain a normal urine output.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A reason: Rotating the injection sites within the same location for a week is not correct. The client should rotate the injection sites within the same location each day to prevent lipodystrophy and ensure consistent absorption.
Choice B reason: Storing the unopened vials of insulin in the freezer is not correct. The client should store the unopened vials of insulin in the refrigerator, not the freezer, to prevent damage to the insulin.
Choice C reason: Drawing up the regular insulin before the NPH insulin is correct. The client should draw up the clear (regular) insulin before the cloudy (NPH) insulin to prevent contamination of the regular insulin with the NPH insulin.
Choice D reason: Injecting the insulin into the muscle for faster absorption is not correct. The client should inject the insulin into the subcutaneous tissue, not the muscle, to ensure appropriate absorption and prevent hypoglycemia.
Correct Answer is C
Explanation
Choice A reason: Respiratory rate and heart rate are not specific indicators of oxygen saturation. They can be affected by many other factors, such as pain, anxiety, or dehydration.
Choice B reason: Blood pressure and temperature are not directly related to oxygen saturation. They can be influenced by other conditions, such as infection, inflammation, or shock.
Choice C reason: Lung sounds and chest expansion are relevant parameters to monitor for a client with low oxygen saturation. They can indicate the presence of respiratory problems, such as pneumonia, asthma, or atelectasis, that can impair gas exchange and oxygen delivery.
Choice D reason: Hemoglobin and hematocrit are measures of red blood cell count and volume. They can affect the oxygen-carrying capacity of the blood, but they are not directly affected by oxygen saturation. They can be altered by other factors, such as bleeding, dehydration, or anemia.
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