What to expect in your first month

The first month is a starting line, not a finish line

Your first four weeks are about your body getting used to the treatment, not about hitting a big number on the scale. A registered doctor will usually begin you on a low dose on purpose. The idea is to give your system time to adjust and to keep early side effects as mild as possible.

That slow start can feel frustrating if you were hoping for fast results. It is doing exactly what it should. Rushing the dose tends to cause more nausea, not more weight loss.

Week by week, roughly

Everyone responds differently, so treat this as a rough map rather than a promise.

Week 1 and 2

You start at a low, introductory dose. Some people notice their appetite settle within days. Others feel almost nothing yet, which is normal and not a sign that it is failing. The so-called food noise, that constant background chatter about snacks and second helpings, may begin to quiet down.

Week 3 and 4

You may still be on the starting dose or moving up to the next step, depending on how you are coping. Portions often start to feel smaller. You might feel full sooner and stay full for longer. Weight on the scale may move a little, stall, or bounce around by a kilogram or two from day to day.

Early side effects

Most early side effects come from the gut and tend to ease as your body adjusts. They are usually worse in the first days after a dose increase.

• Nausea, especially after larger or richer meals
• Constipation or looser stools
• Burping, bloating or reflux
• Tiredness in the first week or two
• A smaller appetite that can make you forget to eat or drink enough

A few habits help. Eat slowly and stop when you feel full rather than when your plate is empty. Go easy on fatty, fried and very sugary food while you settle in. Drink water through the day, aiming for a litre and a half or more. If nausea is strong, smaller and plainer meals are usually kinder than large ones.

Contact your doctor if side effects are severe, if you cannot keep fluids down, or if you get persistent bad stomach pain. Those are worth checking rather than pushing through.

The scale is not a straight line

Weight loss on this class of treatment is rarely a tidy downward slope. It stalls, dips and sometimes ticks up before falling again. Water, salt, hormones, sleep and what you ate yesterday all move the number.

Try weighing yourself no more than once a week, at the same time and in the same clothes. Notice the other signals too. Smaller portions, fewer cravings and clothes fitting differently often show up before a dramatic scale change does.

In the trials for this class of medication, average weight loss ran from roughly 8% to over 20% of body weight, depending on the specific medicine and dose, and that was over many months, not weeks. Your own result may sit anywhere on that range or outside it. Results vary from person to person.

What actually matters in month one

Judge the first month on the basics rather than the scale. Are you tolerating the treatment? Are you eating a bit less without feeling miserable? Are you keeping your follow-up contact with your doctor? If yes, you are on track, even if the number has barely moved.

Keep your doctor in the loop about side effects and how you feel. Dose changes are decided by them, based on how your first weeks go, not by a fixed calendar.

This is general information and not medical advice. An HPCSA-registered doctor decides whether this class of treatment suits you as an individual, using SAHPRA-registered medicines.

Not sure if you qualify? Treatment is generally considered at a BMI of 30 or above, or 27 and above with a weight-related condition such as type 2 diabetes, high blood pressure, high cholesterol, sleep apnoea or fatty liver. A short doctor-led assessment is the simplest way to find out where you stand.