When monitoring patients on antitubercular drug therapy, the nurse knows that which drug may cause a decrease in visual acuity?

Choice A rationale:

Double vision is not a common side effect of quinolones. Quinolones are a type of antibiotic that are used to kill or inhibit the growth of bacteria. While they can have side effects, double vision is not typically one of them.

Choice B rationale:

Tendonitis and tendon rupture are known adverse effects of quinolones. These antibiotics can very rarely cause long-lasting, disabling, and potentially irreversible side effects, sometimes affecting multiple systems, organ classes, and senses. One of these side effects is damage to the tendons, which can manifest as tendonitis (inflammation of the tendon) or even tendon rupture. This is particularly a concern for people older than 60 years and for those with renal impairment or solid-organ transplants because they are at a higher risk of tendon injury.

Choice C rationale:

Neuralgia, or nerve pain, is not a common side effect of quinolones. While these antibiotics can affect the nervous system and cause side effects such as peripheral neuropathy and central nervous system effects, neuralgia is not typically reported.

Choice D rationale:

Hypotension, or low blood pressure, is not typically associated with the use of quinolones. These antibiotics can have various side effects, but a significant drop in blood pressure is not commonly reported.

Choice A rationale:

Insulin is not absorbed most rapidly when injected in the thigh. The abdomen is actually the preferred site for insulin injection as insulin is absorbed more quickly and predictably there. The thigh is a simple area for self-injection, but regular injections in the thigh can sometimes cause discomfort when walking or running afterward.

Choice B rationale:

Using cold insulin for injection to minimize site pain is not recommended. Insulin should be at room temperature. Cold insulin might make the injection more painful.

Choice C rationale:

Massaging the site after injection to promote absorption is not advised. It can cause the insulin to be absorbed too quickly which can lead to low blood glucose levels.

Choice D rationale:

Rotating the injection site to keep insulin levels consistent is the correct choice. People who take insulin daily should rotate their injection sites. This is important because using the same spot over time can cause lipodystrophy. In this condition, fat either breaks down or builds up under the skin, causing lumps or indentations that interfere with insulin absorption.