A nurse is caring for a client who is receiving diazepam as conscious sedation for an endoscopy, Which of the following antidotes should the nurse have on hand during the procedure?

The nurse should include lightheadedness as an adverse effect in the teaching for a client who has a new prescription for atenolol. Atenolol is a beta-blocker medication used to treat various conditions, including hypertension and certain heart conditions. One of the common side effects of beta-blockers is orthostatic hypotension, which can cause lightheadedness or dizziness when the client stands up from a sitting or lying position.

Let's go through the other options:

B. Tachycardia: Tachycardia is not an adverse effect of atenolol. In fact, atenolol is used to treat tachycardia by slowing down the heart rate.

C. Dry mouth: Dry mouth is not a typical adverse effect of atenolol. Dry mouth is more commonly associated with anticholinergic medications rather than beta-blockers like atenolol.

D. Bronchodilation: Bronchodilation is not an adverse effect of atenolol. In contrast, atenolol can cause bronchoconstriction (narrowing of the airways) in some individuals, particularly those with asthma or chronic obstructive pulmonary disease (COPD).

Neostigmine is a medication classified as an acetylcholinesterase inhibitor. It is commonly used to treat myasthenia gravis and to reverse the effects of non-depolarizing neuromuscular blocking agents used during surgery. Adverse reactions to neostigmine are related to its cholinergic effects, which result from increased acetylcholine levels in the body.

Let's go through the options:

A. Hypoactive bowel sounds: Neostigmine can actually increase gastrointestinal motility and may cause increased bowel sounds or even diarrhea, not hypoactive bowel sounds. Therefore, hypoactive bowel sounds are not an adverse reaction to neostigmine.

B. Sweating: Sweating is a cholinergic effect and can be an adverse reaction to neostigmine. Increased sweating is a common sign of cholinergic stimulation.

C. Respiratory distress: Respiratory distress can occur as an adverse reaction to neostigmine, particularly if the client has a history of asthma or other respiratory conditions. Neostigmine can cause bronchoconstriction and excessive secretions, leading to respiratory distress.

D. Urinary retention: Neostigmine is actually used to treat urinary retention by increasing bladder contraction. Therefore, urinary retention is not an adverse reaction to neostigmine.

E. Bradycardia: Bradycardia (slow heart rate) is a significant adverse reaction to neostigmine due to its cholinergic effects on the heart. Increased acetylcholine levels can lead to excessive stimulation of the vagus nerve, resulting in bradycardia.