Medicine guide
Compare three commonly discussed active ingredients by authorised purpose, schedule, clinical context and continuity — then explore the full injection library.
The essential distinction
Semaglutide and liraglutide are GLP-1 receptor agonists. Tirzepatide acts on GIP and GLP-1 receptors. They differ in evidence, dosing schedules, product information, restrictions and how a clinician may monitor treatment.
Brand names are especially easy to confuse: the same active ingredient may appear in products authorised for different conditions. Ask the prescriber to write down the active ingredient, product name, indication and plan.
GLP-1 receptor agonist
Different semaglutide brands and formulations can have different authorised uses. A diabetes brand is not automatically interchangeable with a weight-management product.
What is the exact product, authorised purpose and written titration plan?
GIP / GLP-1 receptor agonist
Tirzepatide acts on two hormone-receptor pathways. Eligibility and product indications vary by country and should be checked against current local information.
Why is this treatment appropriate for me, and who reviews my response?
GLP-1 receptor agonist
Liraglutide has been used for weight management for longer than newer weekly options. Its frequency and reassessment points differ.
What is the escalation schedule and when will benefit be reassessed?
Beyond the main three
The portal also covers setmelanotide, diabetes-only GLP-1 medicines, investigational compounds such as retatrutide and products not approved for weight loss.
Before starting
This is not a complete eligibility screen. The official product information and your clinical history govern the decision.
A safer product conversation
A verbal promise of “the same injection” is not enough to identify a medicine or a safe treatment plan.
Do not substitute casually
Different pens, concentrations and schedules can create dosing errors. The FDA has reported serious adverse events associated with errors involving some unapproved compounded injectable products. Use only the specific product and instructions provided by a qualified prescriber and licensed pharmacy.
Primary sources