Final answer:
The correct auxiliary label for clindamycin oral suspension is to 'Shake well before use' to ensure proper mixing and dosing of the medication.
Step-by-step explanation:
When filling a prescription for clindamycin oral suspension, the technician should ensure to include the auxiliary label that states to Shake well before use. Clindamycin suspension requires shaking to ensure proper mixing of the medication, as the active ingredients can settle at the bottom of the bottle when the medication is not in use. It's important for the effectiveness of the dose and to ensure the patient receives the full benefit of the medication with each use.