increased incidences of thyroid C-cell hyperplasia or neoplasia at any dose.
Dulaglutide is a recombinant protein; no genotoxicity studies have been conducted.
Human relevance of thyroid C-cell tumors in rats is unknown and could not be determined by clinical studies or nonclinical studies [see Boxed Warning and Warnings and Precautions (5.1)].
In fertility and early embryonic development studies in male and female rats, no adverse effects of dulaglutide on sperm morphology, mating, fertility, conception, and embryonic survival were observed at up to 16.3 mg/kg (130-fold the MRHD based on AUC). In female rats, an increase in the number of females with prolonged diestrus and a dose-related decrease in the mean number of corpora lutea, implantation sites, and viable embryos were observed at ≥4.9 mg/kg (≥32-fold the MRHD based on AUC), which occurred in the presence of decreased maternal food consumption and body weight gain.
13.2 Animal Toxicology and/or Pharmacology
Zucker diabetic fatty (ZDF) rats were given 0.5, 1.5, or 5.0 mg/kg/twice weekly of dulaglutide (3-, 8-, and 30-fold the MRHD based on AUC) for 3 months. Increases of 12% to 33% in total and pancreatic amylase, but not lipase, were observed at all doses without microscopic pancreatic inflammatory correlates in individual animals. Other changes in the dulaglutide-treated animals included increased interlobular ductal epithelium without active ductal cell proliferation (≥0.5 mg/kg), increased acinar atrophy with/without inflammation (≥1.5 mg/kg), and increased neutrophilic inflammation of the acinar pancreas (5 mg/kg).
Treatment of monkeys for 12 months with 8.15 mg/kg/twice weekly of dulaglutide (nearly 500-fold the MRHD based on AUC) demonstrated no evidence of pancreatic inflammation or pancreatic intraepithelial neoplasia. In 4 of 19 monkeys on dulaglutide treatment, there was an increase in goblet cells within the pancreatic ducts, but no differences from the control group in total amylase or lipase at study termination. There were no proliferative changes in the thyroid C-cells.
14 CLINICAL STUDIES
TRULICITY has been studied as monotherapy and in combination with metformin, metformin and sulfonylurea, metformin and thiazolidinedione, and prandial insulin with or without metformin.
The studies eva luated the use of TRULICITY 0.75 mg and 1.5 mg. Uptitration was not performed in any of the trials; patients were initiated and maintained on either 0.75 mg or 1.5 mg for the duration of the trials. In patients with type 2 diabetes mellitus, TRULICITY produced reductions from baseline in HbA1c compared to placebo. No overall differences in glycemic effectiveness were observed across demographic subgroups (age, gender, race/ethnicity, duration of diabetes).
14.1 Monotherapy
In a 52-week double-blind study (26 week primary endpoint), 807 patients inadequately treated with diet and exercise, or with diet and exercise and one anti-diabetic agent used at submaximal dose, were randomized to TRULICITY 0.75 mg once weekly, TRULICITY 1.5 mg once weekly, or metformin 1500 to 2000 mg/day following a two week washout. Seventy-five percent (75%) of the randomized population were treated with one antidiabetic agent at the screening visit. Most patients previously treated with an antidiabetic agent were receiving metformin (~90%) at a median dose of 1000 mg daily and approximately 10% were receiving a sulfonylurea.
Patients had a mean age of 56 years and a mean duration of type 2 diab |
