- Sulfonylurea: dosage greater than or equal to, one-half the maximum recommended dosage (eg, glimepiride >/= 4 mg; glipizide, including gastrointestinal therapeutic system [GITS], >/= 10 mg; glyburide >/= 10 mg; Glynase® >/=3 mg). The dosage must have been stable for at least 3 months prior to screening.