Semaglutide is a weekly injection that mimics GLP-1, a hormone your gut releases after eating. It slows stomach emptying and quietens the appetite signalling in your brain, so you feel full sooner and think about food less. It is the active ingredient in Ozempic and Wegovy, and it is prescription-only for good reason.
The mechanism
What Does Semaglutide Actually Do?
Understanding this explains most of what people find surprising about taking it.
Your gut already makes GLP-1. It releases it when you eat, and it does three things: tells your pancreas to release insulin, slows how quickly your stomach empties, and signals to your brain that you have had enough.
Semaglutide is a long-acting version of that signal. One injection holds the effect for a week, which is why the appetite change feels less like willpower and more like the volume being turned down.
The thing patients describe most often is not being less hungry. It is the constant background noise about food going quiet — what researchers have taken to calling food noise. People who have spent decades negotiating with themselves about eating find that startling, sometimes emotional.
It also explains the side effects. A slower stomach means nausea and reflux if you eat as you did before.
Candidacy
Who It Tends to Suit
- Food NoiseConstant thinking about food that willpower has not touched
- Insulin ResistanceWhere metabolic labs show the problem is not effort
- PlateauedDiets that work briefly and then stop working
- Prefers EstablishedLonger track record and more published data than newer options
- Not: PregnancyOr planning it — discuss timing at your visit
- Not: Certain HistoriesSome thyroid and pancreatic histories rule it out
Why supervision matters
The Dose Goes Up Slowly, On Purpose
Almost every bad experience is a titration problem
You start at a dose that is deliberately too low to do much. It steps up every four weeks or so, and each step is a chance to find out whether your body is comfortable there.
Go up too fast and you get the nausea and vomiting people describe on the internet. Go up at the right pace and most patients pass through the same doses with mild, manageable effects.
This is the single clearest argument for having a provider rather than a subscription box. Someone has to decide whether you are ready for the next step, and that decision is made from how you are actually doing, not from a calendar.
If you are struggling, we hold you at a dose. There is no prize for reaching the top of the ladder.
Living with it
Side Effects, and What Actually Helps
- NauseaMost common, usually in the first weeks and after each dose increase. Smaller meals, eating slowly, and stopping at the first sign of fullness do more than any remedy.
- RefluxA slower stomach pushes acid upward. Avoid lying down after eating and keep evening meals lighter.
- ConstipationVery common and very manageable. Water and fibre from the first week rather than the first problem.
- FatigueOften simply undereating. If you have dropped to 900 calories without noticing, this is your body saying so.
- Tell us earlyNearly all of this is fixable by adjusting pace. Quietly suffering and then quitting is the outcome we most want to avoid.
Seek urgent care for severe, persistent abdominal pain — particularly pain radiating to your back. That is not a routine side effect and should be assessed the same day.
The honest part
What Happens If I Stop?
Appetite comes back. For most people so does some of the weight. That is not a flaw in the drug and it is not weakness on your part — semaglutide works by changing appetite signalling while you are taking it.
Which makes the question at your first visit less "how fast can I lose it" and more "what does year two look like". Some patients taper to a lower maintenance dose. Some come off and hold it. Some stay on, the way they would for blood pressure.
We would rather have that conversation at the start than at the end.
Before you book
Questions We Get Asked Most
How does semaglutide work for weight loss?
It is a long-acting version of GLP-1, a hormone your gut releases after eating. It slows stomach emptying and quietens appetite signalling in the brain, so you feel full sooner and think about food far less. One injection holds the effect for about a week.
Is semaglutide the same as Ozempic or Wegovy?
Semaglutide is the active ingredient in both. They are the same molecule approved and dosed for different purposes — Ozempic for type 2 diabetes and Wegovy for weight management. We will tell you exactly what we are prescribing.
How long until semaglutide starts working?
Most people notice appetite changes within the first week or two, but the starting dose is deliberately low. Meaningful weight change usually follows over the first few months as the dose steps up.
How bad is the nausea?
Usually mild and usually temporary, appearing in the first weeks and after each dose increase. Most severe nausea comes from increasing the dose too quickly. Smaller meals, eating slowly and stopping at the first sign of fullness help more than anything else.
What happens when I stop semaglutide?
Appetite returns and for most people some weight comes back, because the medication works while you take it. Tapering to a maintenance dose, stopping and holding with established habits, or continuing long term are all legitimate — we agree which applies to you before you start.
Can I drink alcohol on semaglutide?
In moderation, for most people. Many patients find they want it considerably less, which is a documented effect rather than a coincidence. Alcohol on a much smaller food intake hits harder, so be careful early on.
Do I need to inject it myself?
Yes, weekly, and it is far easier than people expect — a short fine needle into the abdomen or thigh. We show you at your first visit and you can do the first one with us.
Ready when you are
Start Today
Semaglutide starts with a visit and bloodwork, so we prescribe on evidence rather than a form. Payment collects when you book, your consent and intake go out automatically, and your labs and progress live in one record.