Applicant/ PHRC: Hetero Drugs South Africa (Pty) Ltd.
Product proprietary name: VILGLAV 50
Dosage form and strength: Each tablet contains 50 mg of vildagliptin
degradation, DPP-4 (dipeptidyl-peptidase-4). The incretin hormones GLP-1 and GIP enhance
glucose-dependent insulin secretion and exhibit other antihyperglycaemic actions following their
release into the circulation from the gut in response to a meal. GLP-1 also suppresses inappropriate
glucagon secretion. By increasing endogenous levels of these incretin hormones, vildagliptin
enhances glucose- dependent insulin secretion by the pancreatic β-cell and suppresses
inappropriately elevated glucagon secretion by the pancreatic α-cell.
The administration of vildagliptin results in a rapid and complete (> 90 %) inhibition of DPP-4 activity.
The duration of DPP-4 inhibition is dose-dependent. The mean residence time of DPP-4 inhibition
after 50 mg and 100 mg once-daily dosing with vildagliptin is 8,3 hours and 9,6 hours, respectively.
This inhibition in DPP-4 activity by vildagliptin is associated with increases in basal as well as meal-
stimulated GLP-1 and GIP levels throughout the day. Vildagliptin improves pancreatic islet function as
evidenced by the improved ability of the α-cell and β-cell to sense and respond to glucose.
α-cell function: An indication of α-cell function is the ability to suppress inappropriate glucagon
secretion in the presence of hyperglycaemia. In type 2 diabetes, glucagon is inappropriately
suppressed, resulting in increased hepatic glucose production. After a single oral dose of vildagliptin
(100 mg qd) in patients with type 2 diabetes glucagon levels were reduced before the evening meal,
both in the prandial period and throughout the overnight post-absorptive period relative to placebo.
β-cell function: An indication of β-cell function is glucose-dependent insulin secretion. Vildagliptin
improves pancreatic β-cell responsiveness to glucose leading to increased insulin secretion. This
effect occurs only in the presence of elevated glucose concentrations in patients with type 2 diabetes.
In non-diabetic (normal glycaemic) individuals, vildagliptin does not stimulate insulin secretion nor
does it reduce glucose levels.
First phase insulin secretion: An early and sensitive indicator of β-cell function is first phase insulin
secretion in response to intravenous glucose. In untreated type 2 diabetes patients, first phase insulin
secretion is virtually abolished, whereas patients treated with vildagliptin for 12 weeks demonstrated a
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31 October 2023
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