Wegovy (semaglutide) was approved for weight loss as an injection in 2021 and as an oral tablet in June 2026 in the UK. Both routes deliver the same active ingredient but via different administration methods.
How They Work (Same Mechanism)
Both pill and injection are GLP-1 receptor agonists. They suppress appetite, slow stomach emptying, and improve blood sugar control. Efficacy is comparable, but delivery differs.
Bioavailability: Pill vs Injection
Injection (Wegovy): 100% bioavailability. The full dose enters the bloodstream. Predictable effect.
Tablet (oral semaglutide routes): Oral semaglutide is absorbed differently from an injection, so tablet and pen doses should not be compared milligram for milligram. Rybelsus, Wegovy pill and Wegovy injection also need to be kept separate because they use different dose schedules and access routes.
Dosing Differences
Because oral semaglutide is absorbed differently, tablet strengths are not comparable milligram-for-milligram with weekly injection strengths. Wegovy pill dosing uses daily tablet strengths of 1.5mg, 4mg, 9mg and 25mg, while Wegovy injection uses weekly pen doses up to 2.4mg.
Administration & Convenience
Injection: Once-weekly (easy to remember). Inject yourself at home or with help. No specific meal timing. Storage in fridge.
Tablet: Daily administration. Must be taken on empty stomach, 30 minutes before food, sitting upright. More complex routine. Higher pill burden. See our guide on why convenience is driving more UK patients toward the tablet, and what that routine still requires.
Cost Comparison
Injection: £99-200/month depending on provider and dose tier
Tablet: Similar pricing (£99-200/month), but requires daily adherence monitoring
Side Effects: Route Differences?
GI side effects (nausea, vomiting) are similar. Injection may cause injection-site reactions. Tablet requires upright posture to prevent esophageal irritation (rare but reported).
Which to Choose
Injection if you prefer weekly dosing, simpler routine, and 100% predictable absorption.
Tablet if you fear needles, prefer daily control, or have logistics challenges with weekly appointments.
The Bottom Line
Both are effective. Choice depends on lifestyle fit, needle anxiety, and compliance preference. Many people trial one, then switch if needed.
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