Your First Month on Mounjaro: What to Expect in SW6

What happens in your first month on Mounjaro

You have decided to start Mounjaro and have your first injection appointment booked. The next four weeks will feel different from what you might expect. This guide walks you through what actually happens, week by week, and what you can do to manage the adjustment.

Mounjaro is a weekly injection that helps regulate appetite and blood sugar. Your first month is not about dramatic weight loss. It is about your body adjusting to the medication and you learning how to use it properly.

The week before your first injection

Get your home ready. You will need a sharps bin for used needles. Fulham Palace Pharmacy can supply one when you collect your first prescription. Keep your Mounjaro in the fridge at 2-8°C. Do not freeze it. Check the expiry date on the box.

Eat normally. Do not restrict food beforehand or try to "prepare" your body. Your appetite will change soon enough on its own.

Write down any questions about injection technique. Watch the instructional video your pharmacist provides. If you are nervous about needles, say so. The needle is very fine and the injection is quick.

Week 1: Your first injection

Your appointment will take 15 to 20 minutes. The pharmacist will check your blood pressure, confirm you have no contraindications, and show you how to inject. You will do the first injection in the pharmacy under supervision. Most people choose the thigh or abdomen. The needle is so small that many patients say they barely feel it.

After the injection, you can go about your day. You may feel a slight ache at the injection site for a few hours. This is normal.

By day 2 or 3, you might notice your appetite has dropped. Some people feel this immediately. Others do not notice much in week 1. Both are normal.

Nausea is the most common side effect in the first week. It is usually mild and improves over days. Eat small, frequent meals. Avoid greasy or heavy food. Ginger tea, crackers, and plain rice can help. If nausea is severe or does not improve after a few days, contact the pharmacy.

Keep a simple food diary. Note what you eat, how much, and how you feel. This helps you spot patterns and gives your pharmacist useful information at your follow-up.

Week 2-3: Settling in

By now, your appetite suppression is usually more noticeable. You may feel full after smaller portions. This is the medication working as intended. Do not force yourself to eat if you are not hungry, but do not skip meals either. Eat protein and vegetables to stay nourished.

Nausea often peaks around day 5-7 and then improves. If it persists beyond week 2, let your pharmacist know. There are ways to manage it.

Some people experience mild constipation. Drink more water, eat fibre-rich foods, and move around gently. If constipation becomes uncomfortable, a pharmacist can recommend safe options.

Fatigue is less common but can happen. Make sure you are eating enough calories and protein. Rest when you need to.

You may notice you are less interested in foods you normally crave. This is the medication affecting hunger signals in your brain. It is not a sign of anything wrong.

Week 4: Your follow-up check

Fulham Palace Pharmacy will contact you for a follow-up appointment around day 21-28. This is your chance to report how you are getting on. Bring your food diary. Tell your pharmacist about any side effects, how your appetite feels, and whether you have any concerns.

Weight loss in month 1 is often modest, sometimes just a few pounds. This is normal. Mounjaro works best over weeks and months, not days. The focus now is tolerating the medication well and establishing good eating habits.

Your pharmacist will check your blood pressure again and confirm you are safe to continue. If side effects are troublesome, they can discuss strategies or, in rare cases, whether a dose adjustment is needed.

What to expect: common questions

Will I feel hungry at all?

Yes. Mounjaro reduces appetite, not eliminates it. You will still feel hunger, but it will be less intense and easier to ignore. You will also feel full sooner.

What if I feel sick every day?

Nausea usually peaks early and improves. If it does not, tell your pharmacist. Eating smaller meals, avoiding triggers, and staying hydrated help most people. Rarely, a short course of anti-nausea medication is needed.

Can I exercise in week 1?

Light activity is fine. Avoid intense exercise for the first few days. Your body is adjusting. By week 2, normal exercise is safe.

What if I miss a dose or inject late?

Mounjaro is a weekly injection. If you miss your scheduled day, inject as soon as you remember, then resume your normal schedule the following week. Do not double up.

Will I lose weight in the first month?

Some people do, others do not. Weight loss accelerates over months 2-3. The first month is about adjustment and tolerating the medication.

Is it normal to feel tired?

Mild tiredness can happen as your body adjusts. Make sure you are eating enough protein and calories. If fatigue is severe or worsens, mention it at your follow-up.

Getting the most from your first month

Keep your injection day the same each week. Many people choose a day they will remember easily, like a Monday or Friday. Set a phone reminder.

Stay hydrated. Drink at least 2 litres of water daily. This helps with nausea and constipation.

Eat protein at every meal. This keeps you satisfied and supports your body while you adjust.

Be honest with your pharmacist at your follow-up. They have seen hundreds of patients start Mounjaro. Nothing you report will surprise them.

Do not compare your progress to others. Everyone's body responds differently. Your pharmacist is monitoring you individually.

Start your journey with support nearby

Your first month on Mounjaro is manageable when you have a pharmacy team who understands the medication and knows you. Fulham Palace Pharmacy in Fulham offers same-day follow-up appointments and evening slots, so you can check in quickly if something does not feel right. We are here to answer questions, manage side effects, and make sure you stay on track. Start your online consultation today and let us help you through month one.