What Actually Happens at 4 Months on Wegovy

Step 1: The titration phase you've been through (months one to three)

Wegovy's dosing ladder starts at 0.25 mg, which most people find unremarkable in terms of appetite effects. That's by design. The early weeks are about letting your body adjust to semaglutide's mechanism (slowing gastric emptying, signalling fullness earlier, quieting the background noise of hunger) rather than delivering the full therapeutic effect straight away. The prescriber increases the dose roughly every four weeks: 0.25 mg, then 0.5 mg, then 1.0 mg, then 1.7 mg, arriving at the 2.4 mg maintenance dose around week 17 for those who tolerate each step well.

A lot happens physically during those first three months. Nausea, indigestion and changes in bowel habits are the most reported side effects, typically peaking in the first day or two after an injection, then fading. If you're reading this after a rough start, you're not unusual. The three-month mark tends to be the moment people first feel the treatment settle, and month four often confirms that.

The NHS patient information for semaglutide is a useful reference throughout this phase, covering what to expect after each injection and when to contact your healthcare team.

Step 2: Where most people sit at the four-month point, dose and appetite

At four months, the question shifts from "can I tolerate this?" to "is it working?" For the majority of people who have reached 2.4 mg, the appetite suppression by this stage is usually more consistent. Hunger between meals is reduced. Portion sizes feel different without much effort. Many people describe a notable change in their relationship with food, less preoccupation, fewer cravings that feel urgent.

Weight loss at this stage tends to be steady rather than dramatic. The STEP 1 trial, one of the key studies that informed Wegovy's UK licence, tracked weight reduction across 68 weeks; the trajectory at the four-month mark was still clearly descending for most participants. Progress varies considerably between individuals, depending on starting weight, diet, activity, metabolic factors and how consistently the injection is taken.

A short plateau around weeks 12 to 16 is common enough that prescribers expect it. Your body adjusts to a lower calorie intake and energy expenditure can dip temporarily, this is physiology, not failure. Protein intake and staying active (particularly resistance work) both support continued progress through this phase. If you want a grounded account of what the earlier stages of Wegovy treatment look like in practice, including how appetite and side effects shift week by week, that perspective can add useful context to where you are now.

For a sense of what comes next, the five-month stage typically brings further consolidation at maintenance dose.

Step 3: Side effects at four months, what has usually changed

By month four, most people find the GI side effects significantly more manageable than they were at the start. Nausea, which is the most commonly reported complaint, usually tracks closely with dose increases, so if your last increase was a few weeks ago and you're feeling steadier, that fits the pattern. Constipation can persist longer and is worth discussing with your prescriber if it's affecting quality of life; hydration, fibre and movement all help.

Two things are worth knowing at this stage. First, if you experience severe, persistent abdominal pain that radiates toward your back, get medical attention promptly, this symptom needs clinical assessment regardless of when it appears during treatment. Second, if you're a woman taking an oral contraceptive, Wegovy's effect on gastric emptying means absorption of the pill may be affected, particularly around dose increases; your prescriber can advise on additional contraception. The MHRA's guidance on GLP-1 medicines and the NHS semaglutide information page both cover these points clearly.

Report any side effects you're uncertain about through the MHRA Yellow Card scheme, it exists precisely for medicines in active post-market monitoring like Wegovy.

Step 4: Keeping momentum, support and next steps

Honestly, four months in can feel like a strange middle ground. You've done the hard work of the titration phase, the initial excitement has settled into routine, and the end of the treatment period still feels distant. That's a normal place to be, and it's worth naming it.

This is often the point where the lifestyle elements (eating habits, sleep, activity) start to make a bigger visible difference, because the appetite suppression is now working consistently alongside them rather than on top of nausea. A prescriber or dietitian can help you think about protein targets, how to structure meals around the injection day, and whether your dose is doing what it should. Coverage from Reuters on Wegovy's real-world performance and the broader conversation around its use offers a useful outside perspective if you're weighing up how the treatment is regarded beyond clinical trial data.

If you're considering whether Wegovy is the right option for you, or want to understand how the treatment compares with other licensed options in the UK, our weight-loss treatment overview sets out what's available through a regulated pharmacy. For people who've been researching costs, our guide to buying Wegovy safely in the UK covers what to look for, including how to check any online pharmacy on the GPhC register before you order.

If you're already part way through treatment with us and have questions, our support team is available seven days a week. Or, if you're looking to start or continue under clinical care, you're welcome to speak to our prescribers.