The 8-week recommendation stems from tirzepatide's half-life of approximately 5 days, meaning the drug reduces to 50% concentration every 5 days
In a four-peptide blend the risk is amplified: each additional ingredient is another opportunity for an impurity, an endotoxin, or a synthesis error, and copper-containing products add their own stability and dosing considerations
The medication is absorbed into the blood stream through the mucosa underneath the tongue
If needed, it can be kept at room temperature for up to 28 days (depending on the brand), but it should be protected from direct light and kept in its original packaging
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Weight loss itself should generally pause during pregnancy in favor of appropriate gestational weight gain