A nurse is caring for a client who is prescribed warfarin via oral (PO) route.
Two hours after the administration of warfarin, the client reports having dark tarry stools and petechiae.
Based on the client's presenting symptoms, which of the following options is an antidote for warfarin toxicity?

Choice A rationale

Codeine is an opioid used for the treatment of chronic nonproductive cough by decreasing the frequency and intensity. It acts on the brain to reduce the urge to cough, providing symptomatic relief for chronic, dry cough.

Choice B rationale

Codeine is not specifically used to treat allergic rhinitis. Medications such as antihistamines and corticosteroids are more commonly used for this condition.

Choice C rationale

Codeine is not used for non-allergic rhinitis. It is primarily an antitussive agent used to manage chronic cough, not for nasal conditions.

Choice D rationale

This choice is incorrect as codeine has specific indications, including the treatment of chronic nonproductive cough, pain relief, and sometimes as an antidiarrheal.

Choice A rationale

Aspiration is not recommended for subcutaneous injections because it can increase tissue damage and pain. Enoxaparin should be administered without aspiration.

Choice B rationale

Prefilled syringes of enoxaparin contain an air bubble to ensure the entire dose is administered. Expelling the air bubble before injection is not recommended.

Choice C rationale

Enoxaparin should be administered in the abdomen, at least 2 inches away from the umbilicus, to ensure proper absorption and effectiveness.

Choice D rationale

Enoxaparin should be administered subcutaneously, and the needle should be inserted completely to ensure the medication is delivered into the subcutaneous tissue.