Wegovy is semaglutide, given as an injection once a week and licensed for weight management. Digestive symptoms, especially nausea, are among the side effects most commonly discussed with semaglutide, and NHS guidance lists nausea, vomiting, diarrhoea, constipation, and stomach pain as possibilities worth knowing about in advance, so that if they appear they feel less alarming and easier to describe accurately.
Because Wegovy is dosed weekly rather than daily, symptoms can have a rhythm that is worth noticing — some people find certain days after an injection feel different from others, with symptoms clustering in a particular window before settling again. Recording that pattern, rather than just noting 'nausea, again,' gives a prescriber something they can actually work with when deciding what, if anything, needs attention.
What to log
- The day and approximate time the symptom started, relative to your last injection
- What the symptom was: nausea, vomiting, bloating, constipation, looser stools, reflux, or something else entirely
- How severe it felt, in your own words — mild and background, or bad enough to affect your day, work, or sleep
- How long it lasted, from start to when it settled
- Anything that seemed to make it better or worse, without assuming a cause — a certain meal, timing, or activity
- Whether you were still able to eat and drink close to normally, or whether intake dropped noticeably
Why timing relative to the injection matters
A symptom that reliably shows up on the same day or two after your weekly injection and then settles is a different picture, to a prescriber, from one that is constant or unpredictable throughout the week. Neither pattern is something this page can interpret for you, but the distinction is exactly the kind of detail a review appointment benefits from, and it is much easier to describe accurately from notes than from memory.
What a prescriber typically wants to know
Beyond timing and severity, it helps to note whether symptoms are improving, staying the same, or getting worse over several weeks, whether you are able to eat and drink adequately, whether anything about your daily routine has had to change because of them, and whether you have needed to miss work, rest more, or adjust plans as a result.
It is also worth noting whether a symptom is new, or whether it is one you have had on and off since starting treatment. A prescriber reviewing your notes benefits from knowing which symptoms are established and which have just appeared.
When to stop logging and get help instead
Seek urgent medical attention for severe or persistent abdominal pain, repeated vomiting, inability to keep fluids down, signs of dehydration such as dizziness or a dry mouth, blood in vomit or stool, or symptoms of a severe allergic reaction. These are not symptoms to track quietly until your next appointment — they need a healthcare professional's assessment sooner than that, regardless of how thorough your log otherwise is.
For everything else, a calm, dated log is the most useful thing you can bring to a conversation about how treatment is going, and it saves both you and your prescriber from trying to reconstruct weeks of detail from memory in a short appointment.
Keeping the log manageable
You do not need to log every minor twinge every single day. A short entry on the days something is actually happening, and a note that a week was symptom-free otherwise, is usually enough to build a useful picture over time. Trying to record too much detail can become its own burden, and a log that feels exhausting to keep is less likely to be kept accurately, or at all.
If side effects are ongoing rather than occasional, it can help to note them at a fixed point each week — for example, a short weekly summary alongside your daily notes — so that even a busy or difficult week still leaves you with something to look back on, rather than a gap that later makes the whole month harder to piece together.