Final answer:
The formulation of Aumentin contraindicated with CrCl <30 is Augmentin XR.
Step-by-step explanation:
The formulation of Aumentin that is contraindicated with CrCl <30 is Augmentin XR.
Augmentin XR is a extended-release formulation of the antibiotic Augmentin, which contains amoxicillin and clavulanate potassium.
Patients with a CrCl <30 have severe renal impairment and Augmentin XR is not recommended in this population due to the potential for accumulation of clavulanate potassium.