Hair Loss
Weight-Loss Tablets vs Injections: How to Choose
In one sentence: Weight-loss medicines come as tablets, such as the Wegovy pill and orlistat, and as weekly injections, such as the Wegovy injection and Mounjaro, and the right format depends on whether you want to avoid needles, how the routine fits your life, and what a prescriber thinks suits you.
At a glance
Tablets include the Wegovy pill and orlistat (Xenical and Alli).
Injections include the Wegovy injection and Mounjaro, given once a week.
The obvious difference is needles: tablets avoid them, injections do not.
They also differ in how often you take them and how they work.
Orlistat and the injections can be on the NHS if you qualify; the Wegovy pill is private.
All of them work best alongside diet and activity.
Medical weight-management options have grown quickly, and they now split broadly into two formats: tablets you swallow and injections you give yourself once a week. Both can help, but they differ in ways that matter day to day. This guide compares the two formats, names the main options in each, and helps you think through which could suit you.
Key takeaways
What are the tablet options?
The Wegovy pill (oral semaglutide) and orlistat (Xenical and Alli).
What are the injection options?
The Wegovy injection and Mounjaro, both once a week.
Main difference?
Needles, how often you take it, and how each one works.
Which is better?
Neither, as a rule. It depends on you and your prescriber.
What is the difference between weight-loss tablets and injections?
The clearest difference is the format itself: tablets are swallowed, and injections are given under the skin, usually once a week. Beyond needles, they differ in how often you take them and how they work in the body. All of them are used alongside a reduced-calorie diet and more physical activity.1 Here is how the two formats compare.
Feature | Weight-loss tablets | Weight-loss injections |
| Examples | Wegovy pill, orlistat (Xenical, Alli) | Wegovy injection, Mounjaro |
| Needle | No | Yes, a small weekly injection |
| How often | Daily (Wegovy pill) or with meals (orlistat) | Once a week |
| How they work | Reduce appetite (Wegovy pill) or block fat absorption (orlistat) | Reduce appetite by acting on gut hormones |
| Available on the NHS? | Orlistat yes; Wegovy pill: private only | Yes, for those who are eligible |
| Prescription needed? | Wegovy pill and Xenical yes; Alli over the counter | Yes |
"The tablet-versus-injection question is really a lifestyle question. Some people cannot face a weekly injection, and a daily tablet suits them far better. Others prefer one injection a week to remembering something every day. Neither is the right answer for everyone, which is why we talk it through."
What weight-loss tablets are there?
There are two main tablet options, and they work in different ways. The Wegovy pill is oral semaglutide, taken once a day, which reduces your appetite so you eat less.2 Orlistat works differently, blocking about a third of the fat in your food from being absorbed, and is taken with meals.3 Orlistat comes as Xenical (120mg, prescription) and Alli (60mg, over the counter). To compare the two tablets directly, see Wegovy pill vs orlistat.
What weight-loss injections are there?
The two main licensed weight-management injections are the Wegovy injection, which is semaglutide, and Mounjaro, which is tirzepatide. Both are given as a small injection under the skin once a week, and both reduce appetite by acting on gut hormones.4 Mounjaro works on two gut hormones rather than one.5 One point of confusion: Ozempic is a semaglutide injection too, but it is licensed for type 2 diabetes, not weight loss, as explained in semaglutide brands explained.
Tablets vs injections: the main differences
Three things usually decide it. The first is needles: if you would rather not inject, the tablets take that off the table. The second is routine: the Wegovy pill is a daily tablet on an empty stomach, orlistat is taken with meals, and the injections are once a week. The third is how they work: the Wegovy pill and the injections reduce appetite, while orlistat blocks fat absorption. To compare the Wegovy pill against its own injection, see Wegovy pill vs Wegovy injection.
"People assume an injection must be stronger than a tablet, but it is not that simple. These medicines work in different ways and were studied in different trials, so it is not a straight race. What matters more is finding one you will actually stick with, alongside changes to how you eat and move."
Are weight-loss tablets or injections available on the NHS?
Some are, and some are not. Orlistat can be prescribed on the NHS for people who are eligible.3 The weight-management injections are also available on the NHS for those who meet the criteria, through specialist services and, for tirzepatide, a phased rollout.4 The Wegovy pill is newer and is currently available privately only. All of them need a prescriber to confirm they are suitable for you.
"For a lot of people, the appeal of the newer tablet is simply that there is no needle, and that can be the deciding factor. But it is worth knowing that some options, including orlistat and the injections, are available on the NHS if you are eligible, while the Wegovy tablet is currently private."
Which is right for me: a tablet or an injection?
It comes down to needles, routine, NHS access and your health. If avoiding injections matters most, a tablet is the obvious route. If a once-a-week injection sounds easier to keep up than a daily tablet, that may suit you better. A prescriber weighs these up with you, along with any health conditions, before recommending an option. You can start that process through an online weight-loss consultation for the Wegovy pill, or explore the Wegovy injection, Mounjaro and orlistat.
Related Wegovy pill guides
Frequently asked questions about weight-loss tablets and injections
Are weight-loss tablets or injections better?
Neither is described as better. Tablets and injections can both help with weight management, but they work in different ways and suit different people. The right choice depends on needles, routine, NHS access and your health. A prescriber can help you decide.
What weight-loss tablets are available in the UK?
The main options are the Wegovy pill, which is oral semaglutide and reduces appetite, and orlistat, which blocks some fat from being absorbed. Orlistat comes as Xenical (prescription) and Alli (over the counter). The Wegovy pill is prescription only.
What weight-loss injections are available in the UK?
The main licensed weight-management injections are the Wegovy injection (semaglutide) and Mounjaro (tirzepatide), both given once a week. Ozempic is a semaglutide injection too, but it is licensed for type 2 diabetes, not weight loss.
Are weight-loss tablets as effective as injections?
They work differently and were studied in different trials, so it is not a straightforward comparison. Some tablets reduce appetite, one blocks fat absorption, and the injections act on gut hormones. A prescriber can talk you through what to expect from each option.
Are weight-loss tablets or injections available on the NHS?
Orlistat can be prescribed on the NHS, and the weight-management injections are available on the NHS for people who meet the criteria. The Wegovy pill is currently available privately only. All of them need a prescriber to confirm they are suitable.
Do you have to use a needle for weight-loss medicine?
No. If you would rather avoid needles, the Wegovy pill and orlistat are taken by mouth. The injections, such as the Wegovy injection and Mounjaro, involve a small weekly injection. A prescriber can help you choose based on your preferences and health.
Sources and references
NHS. Overweight and obesity. Sets out that weight-loss medicines are used alongside a reduced-calorie diet and increased physical activity.
electronic medicines compendium (emc). Wegovy tablets: Summary of Product Characteristics. Describes oral semaglutide as a once-daily tablet that reduces appetite, licensed for weight management.
NHS. Orlistat. Explains that orlistat stops about a third of the fat from food being absorbed, is taken with meals, comes as Xenical and Alli, and can be prescribed on the NHS for eligible patients.
NHS England. Weight-management injections. Describes the once-weekly GLP-1 injections used for weight management and how they are accessed on the NHS.
electronic medicines compendium (emc). Mounjaro (tirzepatide): Summary of Product Characteristics. Describes tirzepatide as a once-weekly injection that acts on two gut hormones, licensed for weight management and type 2 diabetes.
Medical disclaimer: This article is for general information and does not replace advice from a qualified healthcare professional. The weight-management medicines named here are prescription-only, apart from Alli, which is a pharmacy medicine. If you have questions about your health, contact your GP or call NHS 111.
Our commitment to accuracy: This page reflects current UK guidance from sources such as the NHS, NICE, the MHRA and the approved product information. It is reviewed by our Superintendent Pharmacist and updated as guidance changes.
About the author
Blog author
Dayna Sheppard
Dayna is a pharmacy manager with over 15 years of pharmacy experience. She is focused on delivering a safe and excellent pharmacy service for patients.
Medically reviewed by
Medical reviewer
Taslima Hussain
Taslima is a pharmacist who is passionate about patient care. She has experience working in community pharmacy as a locum.
