Long-acting reversible contraceptives (LARCs) such as intrauterine devices (IUDs), the contraceptive implant, and injectable contraception are completely unaffected by gastric emptying or gastrointestinal absorption
Lifestyle Factors Sleep quality, stress levels, and hydration also affect how your body responds and how easy it feels to stay on track

Try the BMI Calculator Table of contents Why the timing question matters for weekly GLP-1 medications The pharmacokinetic case for the 48-hour window One day early vs two days early: where the risk threshold sits The pattern problem: when occasional becomes habitual What most articles get wrong about "missing" vs "early" doses The permanent schedule-change protocol Clinical scenarios: when early dosing is the right call When early dosing creates actual risk The decision tree: should you take it early or wait Traveling across time zones: the special case What to do if you've already taken it early FAQ Why the timing question matters for weekly GLP-1 medications Semaglutide (sold as Ozempic, Wegovy, and available as compounded semaglutide) is dosed once weekly because its half-life is approximately 165 hours, or roughly 7 days (Lau et al., Clinical Pharmacokinetics 2015)
The trade-off is reduced precision at lower doses
Often, its both and the interaction between the two is something most prescribers arent trained to flag