In Legacy eRx a patient's allergies are listed under the Compose Rx tab. Legacy eRx uses the allergies entered here when checking for Legacy eRx Drug-Drug, Drug-Allergy Interaction Checks. Allergies entered in Open Dental are not currently passed to Legacy eRx; you must manually enter them.

To add an allergy:
- Click Allergy / Intolerance.

- Enter all or part of the allergy (brand, ingredient, or drug category such as NSAID), then click Search For Allergy. You can also select a Common Allergy / Intolerance, or add a non-drug allergy if a match is not found.

- Click the drop down to select the allergy severity level and onset date. Enter any notes.
- Click Save Allergy. It will be added to the list.