What is the fine-grained topic of the following text: Phenylephrine HCl Injection, USP is intended for the maintenance of an adequate level of blood pressure during spinal and inhalation anesthesia and for the treatment of vascular failure in shock, shock like states, and drug-induced hypotension, or hypersensitivity. Only return the topic.
Phenylephrine HCl Injection, USP: Uses and Applications