The dosing structures are fundamentally different because each peptide has a different receptor profile, different potency per milligram, and different pharmacokinetic properties
See the retatrutide titration protocol for dose-escalation details
While some unwanted side effects have come from the method, there have also been some that have been welcomed by users
"Smaller players will likely need to demonstrate either superior tolerability, novel indication-specific efficacy, meaningfully different dosing convenience, or combination strategies that address limitations of current agents, particularly muscle loss, rather than simply competing on weight-loss magnitude alone," says Nadolsky
Early data indicates retatrutide may outperform tirzepatide in diabetic kidney disease and weight loss
Soliqua 100/33 (insulin glargine and lixisenatide injection): Prescribing information