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Clinically reviewed guide

Why weight loss can plateau—and what to review

A slower month does not automatically mean that your plan has failed or that treatment should change.

Progress is rarely a straight line

Weight can change from week to week because of fluid balance, illness, menstrual cycles, bowel habits and differences in when or how it is measured. A clinician will usually look at the longer trend rather than one reading in isolation.

A review should consider the whole picture

Your progress review may include weight and waist measurements, treatment response, side effects, appetite, nutrition, activity, sleep and the practical pressures affecting your routine. It is also important to check whether treatment is being used as agreed and remains safe and appropriate.

A plateau is not a reason to alter treatment yourself

Do not change a prescribed dose, combine treatments or obtain additional medicine without speaking to your prescriber. The safest next step depends on your health, current treatment, tolerability and progress over time.

At Sweenys Health

Patients attend face-to-face reviews at our Derry clinic so progress, relevant measurements, side effects and next steps can be considered together.

Focus on actions you can sustain

Consistent meals, adequate protein and fibre, regular movement, resistance exercise where suitable, sleep and realistic routines can all matter. Your plan should be individual and achievable rather than based on an extreme short-term response.

Explore our Derry weight-management clinic

Clinical content reviewed byKillian Johnston

Pharmacist Independent Prescriber · Owner, H Sweeny Chemist

Last reviewedAugust 2026

Content is reviewed regularly and updated when services or clinical guidance change.