<dosage xmlns="http://hl7.org/fhir">
    <text value="1 drop in each eye once daily in the evening." />
    <timing>
        <repeat>
            <frequency value="1" />
            <period value="1" />
            <periodUnit value="d" />
            <when value="EVE" />
        </repeat>
    </timing>
    <site>
        <coding>
            <system value="http://snomed.info/sct" />
            <code value="362508001" />
            <display value="Both eyes, entire" />
        </coding>
    </site>
    <route>
        <coding>
            <system value="http://snomed.info/sct" />
            <code value="54485002" />
            <display value="Ophthalmic route (qualifier value)" />
        </coding>
    </route>
    <method>
        <coding>
            <system value="http://snomed.info/sct" />
            <code value="421538008" />
            <display value="Instill - dosing instruction imperative (qualifier value)" />
        </coding>
    </method>
    <doseAndRate>
        <doseQuantity>
            <value value="1" />
            <unit value="drops" />
            <system value="http://snomed.info/sct" />
            <code value="426684005" />
        </doseQuantity>
    </doseAndRate>
</dosage>