Ketamine (racemic ketamine; Ketalar) is a Schedule III anesthetic agent with established FDA approval for anesthesia but is not FDA‑approved for any psychiatric disorder (i.e., depression/PTSD) and therefore its use for psychiatric indications in Puerto Rico is off‑label. Many private clinics in Puerto Rico and elsewhere offer IV/IM ketamine infusions or compounded ketamine formulations for depression, chronic pain, and other indications; these treatments are generally delivered in private, cash‑pay or out‑of‑network settings and are frequently not reimbursed by public or commercial payers because the indication is off‑label and compounded formulations are not FDA‑approved. The FDA has specifically warned about risks associated with compounded ketamine products and emphasized that ketamine is not FDA‑approved for psychiatric disorders; clinics offering infusion therapy typically require private payment and may assist with prior authorization for related services (monitoring, facility fees) on a case‑by‑case basis, but routine insurer reimbursement is uncommon. Regional/regulatory notes: providers must comply with controlled‑substance registration and local prescribing laws in Puerto Rico; clinics administering ketamine for psychiatric uses should maintain informed‑consent documentation and be aware of FDA guidance on compounded products. Representative references: FDA safety communication on compounded ketamine and contemporary reporting on payer practices for ketamine infusion therapy. # #