What to Track When Using Weight Loss Injections

If you’re starting a medical weight loss programme with injections like tirzepatide, you’re taking a significant step toward improving your health. This medication — known under the brand Mounjaro — has been proven to help reduce appetite, support weight loss, and improve health outcomes. But medication is only one piece of the puzzle.

At Bourne End Pharmacy, we recommend using a weight loss tracker alongside your treatment. Tracking not only keeps you motivated — it also helps you and your healthcare provider monitor progress, detect side effects early, and make any necessary adjustments to your plan.

Here’s what you should be tracking during your injectable weight loss journey — and how our pharmacy can help guide you every step of the way.

1. Dosage and Injection Dates

Why it matters:

Mounjaro (tirzepatide) is typically started at a low dose and gradually increased to help minimise side effects such as nausea or gastrointestinal discomfort. As the treatment progresses, you may move through various dose levels depending on your response and tolerance. Keeping a clear record of each injection helps ensure you’re on track, especially if you’re preparing for a dose escalation.

What to track:

• Date and time of each Mounjaro injection

• Dose taken (e.g. 2.5mg, 5mg, 7.5mg, 10mg, 12.5mg, 15mg)

• Injection site used (rotate between areas such as the thigh, stomach, or upper arm to reduce irritation)

Pro tip: Use your weight loss tracker to note any missed or delayed doses, and always speak to our pharmacy team at Bourne End if you’re unsure how to manage timing or dose adjustments.

2. Weight and Measurements

Why it matters:

Mounjaro supports weight loss over time, but relying solely on the number on the scale doesn’t always tell the full story. Tracking your weekly weight alongside measurements such as waist or hip circumference gives a more accurate picture of fat loss. You may notice your clothes fitting better even before the scales show a big change.

What to track:

• Weekly body weight (same time, same conditions each week)

• Waist, hip, and chest measurements

• Notable changes in clothing fit or visible progress in photos

Top tip: Consistency is key. Always weigh yourself under similar conditions — for example, in the morning before eating — to get the most accurate readings over time.

3. Appetite and Portion Sizes

Why it matters:

Mounjaro works by activating both GLP-1 and GIP hormone receptors, which help regulate appetite and glucose levels. Most patients report a reduced sense of hunger and feeling fuller on smaller portions. Keeping track of these changes helps ensure you’re still eating balanced, nutritious meals — and allows your pharmacist to monitor your overall health.

What to track:

• Daily hunger levels (rate 1–10)

• Notable changes in portion sizes or meal frequency

• Skipped meals or any disinterest in eating

Did you know? Some people on Mounjaro unintentionally eat too little, which can lead to low energy or fatigue. If you find your food intake dropping significantly, speak to one of our pharmacists at Bourne End Pharmacy — we can help you maintain proper nutrition alongside your treatment.

4. Food Intake and Hydration

Why it matters:

Tracking meals isn’t just for calorie counting. It helps you stay mindful of what you’re eating, avoid nutrient gaps, and monitor any triggers or cravings that remain.

What to track:

• Types of meals and snacks

• Water intake (aim for 1.5–2 litres per day)

• Any food-related side effects (e.g. nausea after eating fatty foods)

Tip from us: A simple daily journal or a digital app can help you log meals — or you can use our printable Bourne End Pharmacy weight loss tracker, available in store.

5. Side Effects and Symptoms

Why it matters:

Most side effects from weight loss injections are mild and temporary, but it’s important to note anything unusual — especially when increasing your dose.

What to track:

• Nausea, bloating or indigestion

• Constipation or diarrhoea

• Headaches or dizziness

• Any signs of injection site irritation

What to do: Bring your tracker to your next check-in with our pharmacy team. It allows us to assess tolerability and decide if you need dose adjustments, anti-nausea strategies or further support.

6. Mood and Motivation

Why it matters:

Weight loss journeys can impact your mental wellbeing. Tracking your mood can help identify emotional triggers or signs of burnout — and is key to a sustainable, compassionate approach to health.

What to track:

• Daily mood rating

• Energy levels and sleep quality

• Stress, motivation, and emotional eating triggers

Support tip: Our pharmacists are here to listen — and we can refer you to local wellbeing services if needed.

7. Physical Activity and Movement

Why it matters:

You don’t need to hit the gym every day, but regular movement supports fat loss, improves energy and helps reduce the risk of muscle loss while losing weight.

What to track:

• Steps walked or minutes active

• Type of activity (walking, swimming, yoga, etc.)

• How you felt during/after exercise

Even gentle movement makes a difference. Use your weight loss tracker to log progress and build a routine that fits your life.

Bourne End Pharmacy Is Here to Help

Our medical weight loss injection programme offers more than just prescriptions. We provide structured support, progress reviews, and personalised care. If you’re thinking about starting tirzepatide, our team can help you track your progress safely and effectively.

Ask in-store about our free weight loss tracker template, or book a one-to-one consultation to begin your journey with confidence.

This blog was written on behalf of Bourne End Pharmacy by Pharmacy Mentor.