Pilocarpine Monohydrochloride S cis Isomer, commonly known as PMSI, has several synonymous names that refer to the same chemical compound. The most frequently used synonyms for PMSI are S-Carpine, S-Pilo, and S-Ject. These names are often utilized interchangeably in the pharmaceutical industry to identify the medication derived from this isomer. PMSI is primarily used to treat conditions such as glaucoma and dry mouth, as it acts as a miotic agent and stimulates saliva production. Its varying synonyms ensure that healthcare professionals and patients can easily recognize and discuss this medication within different medical contexts.