Medication Instructions Abbreviation “e/s”
In many prescription-writing conventions, e/s means each side. This abbreviation is used to indicate that an instruction applies to both the right and left sides (for example, dosing for the right and left eye or other paired body areas).
Typical Use Cases
- Ophthalmic prescriptions: “1 drop e/s” indicates dosing to each eye.
- Nasal or ear prescriptions (when written for paired sites): “apply e/s” indicates application to both sides.
Important Clarification
Meaning can vary by prescriber and local shorthand conventions. When the prescription text or indication is unclear, verification with the prescribing clinician or dispensing pharmacist is recommended.