How long are cholinergic agonists such as pilocarpine required to be held before doing tear assessments (ocular scoring and Schirmer’s) and sialography/salivary collection?

Discussed this with ocular and oral colleagues in the Berkeley Sjogren's Clinic. Neither request patients be off secretagogues before testing. If the testing is normal, and there is a reason to retest, they will ask the patient to hold the medication for 12-24 hours. Ocular expert did not see much e...