Drugs That Reduce Wegovy's Effectiveness
Semaglutide (Wegovy's active ingredient) slows gastric emptying, which can affect oral medications' absorption. Drugs inducing faster gastric emptying—like prokinetic agents (e.g., metoclopramide)—may lower semaglutide levels. Insulin secretagogues such as sulfonylureas (e.g., glipizide, glyburide) increase hypoglycemia risk when combined, requiring dose adjustments.[1][2]
Medications Raising Hypoglycemia Risk
Combining Wegovy with insulin or insulin secretagogues heightens low blood sugar chances, especially in type 2 diabetes patients. Symptoms include shakiness, sweating, or confusion—monitor closely and reduce doses if needed. Other antidiabetics like metformin have minimal interaction but still warrant blood glucose checks.[1][3]
Drugs Affected by Delayed Absorption
Wegovy's gastric effects can delay or reduce absorption of:
- Oral contraceptives: May lower efficacy; use backup methods like condoms for 4 weeks after starting or dose increases.
- Thyroid hormones (e.g., levothyroxine): Monitor levels and adjust doses.
- Antibiotics (e.g., doxycycline) or antifungals: Absorption may drop; time doses apart.
No major issues with warfarin or digoxin, but therapeutic monitoring is advised.[1][2][4]
Alcohol and Lifestyle Interactions
Alcohol boosts hypoglycemia risk and may worsen GI side effects like nausea. Limit intake and watch blood sugar.[1][3]
How to Manage Interactions
Consult a pharmacist or doctor before starting—use tools like the FDA label or interaction checkers. Wegovy's prescribing info lists 100+ potential interactions, mostly mild-moderate.[2] Report issues via FDA MedWatch.
Sources
[1]: FDA Wegovy Label
[2]: Drugs.com Wegovy Interactions
[3]: Novo Nordisk Wegovy Prescribing Info
[4]: Medscape Semaglutide Interactions