Which antibiotic is recommended for a patient who is unable to swallow?

Ertapenem is an appropriate choice for patients who are unable to swallow due to its formulation and administration options. It is a beta-lactam antibiotic that can be administered via intravenous (IV) or intramuscular (IM) injection, making it accessible for patients who cannot take oral medications. This parenteral route ensures that the patient receives the full therapeutic dosage without the need for oral intake, which may be compromised in various clinical scenarios.

Other antibiotics listed may not be suitable for patients who cannot swallow. For instance, ciprofloxacin, amoxicillin, and doxycycline are primarily available in oral formulations, which are not applicable for patients with swallowing difficulties. Thus, ertapenem stands out as the correct answer in this situation, providing both effectiveness in treating severe infections and an appropriate delivery method for those unable to take medications orally.