Xultophy Drug Interactions

Pharmacodynamic interactions: Interaction studies with Xultophy have not been performed. A number of substances affect glucose metabolism and may require dose adjustment of Xultophy.
The following substances may reduce the Xultophy requirement: Antidiabetic medicinal products, monoamine oxidase inhibitors (MAOI), beta-blockers, angiotensin converting enzyme (ACE) inhibitors, salicylates, anabolic steroids and sulfonamides.
The following substances may increase the Xultophy requirement: Oral contraceptives, thiazides, glucocorticoids, thyroid hormones, sympathomimetics, growth hormones and danazol.
Beta-blockers may mask the symptoms of hypoglycaemia.
Octreotide/lanreotide may either increase or decrease the Xultophy requirement.
Alcohol may intensify or reduce the hypoglycaemic effect of Xultophy.
Pharmacokinetic interactions: In vitro data suggest that the potential for pharmacokinetic drug interactions related to CYP interaction and protein binding is low for both liraglutide and insulin degludec.
The small delay of gastric emptying with liraglutide may influence absorption of concomitantly administered oral medicinal products. Interaction studies did not show any clinically relevant delay of absorption.
Warfarin and other coumarin derivatives: No interaction study has been performed. A clinically relevant interaction with active substances with poor solubility or with narrow therapeutic index such as warfarin cannot be excluded. Upon initiation of Xultophy treatment in patients on warfarin or other coumarin derivatives more frequent monitoring of INR (International Normalised Ratio) is recommended.
Paracetamol: Liraglutide did not change the overall exposure of paracetamol following a single dose of 1,000 mg. Paracetamol C_max was decreased by 31% and median t_max was delayed up to 15 min. No dose adjustment for concomitant use of paracetamol is required.
Atorvastatin: Liraglutide did not change the overall exposure of atorvastatin to a clinical relevant degree following single dose administration of atorvastatin 40 mg. Therefore, no dose adjustment of atorvastatin is required when given with liraglutide. Atorvastatin C_max was decreased by 38% and median t_max was delayed from 1 h to 3 h with liraglutide.
Griseofulvin: Liraglutide did not change the overall exposure of griseofulvin following administration of a single dose of griseofulvin 500 mg. Griseofulvin C_max increased by 37% while median t_max did not change. Dose adjustments of griseofulvin and other compounds with low solubility and high permeability are not required.
Digoxin: A single dose administration of digoxin 1 mg with liraglutide resulted in a reduction of digoxin AUC by 16%; C_max decreased by 31%. Digoxin median time to maximum concentration (t_max) was delayed from 1 h to 1.5 h. No dose adjustment of digoxin is required based on these results.
Lisinopril: A single dose administration of lisinopril 20 mg with liraglutide resulted in a reduction of lisinopril AUC by 15%; C_max decreased by 27%. Lisinopril median t_max was delayed from 6 h to 8 h with liraglutide. No dose adjustment of lisinopril is required based on these results.
Oral contraceptives: Liraglutide lowered ethinylestradiol and levonorgestrel C_max by 12 and 13%, respectively, following administration of a single dose of an oral contraceptive product. T_max was delayed by 1.5 h with liraglutide for both compounds. There was no clinically relevant effect on the overall exposure of either ethinylestradiol or levonorgestrel. The contraceptive effect is therefore anticipated to be unaffected when co-administered with liraglutide.