Why Does Mounjaro Make You Cold? Causes & Solutions UK

Clinically Proven UK Registered Pharmacy

Why Does Mounjaro Make You Cold - From £124.99

Mounjaro from £124.99, £20 off first order with code Weightlossnew.

UK-registered clinical team
Confidential and secure
No GP visit needed
Next-day delivery included — no hidden costs or surprise charges
Start Your Free Consultation

Takes less than 2 minutes to complete 100% online

Weightlossnew £20 off for new customers

Treatment from £124.99

Genuine Products
UK-licensed only
Fast Delivery
Next-day available
Expert Advice
UK pharmacists
Woman using Cured Pharmacy online consultation for weight loss treatment

Check your BMI

Height 175 cm
Weight 82 kg

Your BMI

26.8
Start Free Consultation

Free · BMI thresholds shown are illustrative. Final eligibility is confirmed by a UK prescriber during your free consultation.

LIVE PRICING

Our Pricing

Pricing Disclaimer: Prices on some pages may not be up to date — the live pricing table below and pricing shown during consultation are official current prices and take precedence over any other figures on the site.

Mounjaro (Tirzepatide)
Weeks 1–4

2.5mg

1 pen • 4 Weeks

£145 £124.99

£31.25 / Per Week

Your starting dose – designed to help your body adjust gently to treatment

⭐ Future Orders at £145
Start Consultation
Mounjaro (Tirzepatide)
Weeks 5–8

5mg

1 pen • 4 Weeks

£179 £159.00

£39.75 / Per Week

First step up – builds on your progress as your body adapts to treatment

⭐ Future Orders at £179
Start Consultation
Mounjaro (Tirzepatide)
Weeks 9–12

7.5mg

1 pen • 4 Weeks

£220 £200.00

£50.00 / Per Week

Mid-range dose – for continued progression and enhanced results

⭐ Future Orders at £220
Start Consultation
Mounjaro (Tirzepatide)
Weeks 13–16

10mg

1 pen • 4 Weeks

£245 £225.00

£56.25 / Per Week

Higher strength dose – supports significant weight loss progress

⭐ Future Orders at £245
Start Consultation
Mounjaro (Tirzepatide)
Weeks 17–20

12.5mg

1 pen • 4 Weeks

£270 £250.00

£62.50 / Per Week

Advanced dose – for patients requiring stronger therapeutic effect

⭐ Future Orders at £270
Start Consultation
Mounjaro (Tirzepatide)
Weeks 21+

15mg

1 pen • 4 Weeks

£287 £267.00

£66.75 / Per Week

Maximum dose – the highest available strength for optimal results

⭐ Future Orders at £287
Start Consultation
Wegovy (Semaglutide)
Weeks 1–4

0.25mg

1 pen • 4 Weeks

£89 £69.00

£17.25 / Per Week

Your starting dose – eases your body into treatment with minimal side effects

⭐ Future Orders at £89
Start Consultation
Wegovy (Semaglutide)
Weeks 5–8

0.5mg

1 pen • 4 Weeks

£109 £89.00

£22.25 / Per Week

First step up – continues building tolerance for long-term success

⭐ Future Orders at £109
Start Consultation
Wegovy (Semaglutide)
Weeks 9–12

1mg

1 pen • 4 Weeks

£119 £99.00

£24.75 / Per Week

Mid-range dose – where most patients start seeing meaningful results

⭐ Future Orders at £119
Start Consultation
Wegovy (Semaglutide)
Weeks 13–16

1.7mg

1 pen • 4 Weeks

£169 £149.00

£37.25 / Per Week

Higher strength – supports accelerated weight loss progress

⭐ Future Orders at £169
Start Consultation
Wegovy (Semaglutide)
Weeks 17+

2.4mg

1 pen • 4 Weeks

£199 £179.00

£44.75 / Per Week

Maximum dose – the highest available strength for optimal weight management

⭐ Future Orders at £199
Start Consultation
Wegovy (Oral Pill)
Weeks 1–4

1.5mg

1 pen • 4 Weeks

£83.00 £63.00

£20.75 / Per Week

Your starting dose – eases your body into treatment with minimal side effects

⭐ Future Orders at £83.00
Start Consultation
Wegovy (Oral Pill)
Weeks 5–8

4mg

1 pen • 4 Weeks

£110.00 £90.00

£27.50 / Per Week

First step up – continues building tolerance for long-term success

⭐ Future Orders at £110.00
Start Consultation
Wegovy (Oral Pill)
Weeks 9–12

9mg

1 pen • 4 Weeks

£140.00 £120.00

£35.00 / Per Week

Mid-range dose – where most patients start seeing meaningful results

⭐ Future Orders at £140.00
Start Consultation
Wegovy (Oral Pill)
Weeks 13+

25mg

1 pen • 4 Weeks

£199.00 £179.00

£49.75 / Per Week

Maximum dose – the highest available strength for optimal weight management

⭐ Future Orders at £199.00
Start Consultation

Why Does Mounjaro Make You Cold? Understanding Temperature Changes

Published: 10 September 2026

Many patients ask why does Mounjaro make you cold after starting treatment with this tirzepatide-based weight loss injection. Cold sensitivity is a recognised side effect experienced by some users, typically linked to metabolic changes, reduced calorie intake, and shifts in body composition during weight loss. Understanding the physiological mechanisms behind this temperature regulation change can help you manage the symptom effectively whilst continuing your treatment journey.

Why Does Mounjaro Make You Cold: The Science Behind Temperature Sensitivity

The question of why does Mounjaro make you cold relates directly to how tirzepatide influences your metabolism and energy expenditure. As a dual GIP/GLP-1 receptor agonist, Mounjaro works by reducing appetite and slowing gastric emptying, which typically leads to a significant reduction in daily calorie intake [1]. When your body receives fewer calories than it's accustomed to, it may lower your basal metabolic rate slightly as an adaptive response, which can manifest as feeling colder than usual.

Additionally, rapid weight loss—a common outcome in clinical trials where participants lost an average of 15-20% of body weight—means you're losing subcutaneous fat that normally acts as insulation [2]. This reduction in insulating tissue makes you more susceptible to environmental temperature changes. The metabolic shift from glucose to fat oxidation during weight loss also generates less metabolic heat compared to carbohydrate metabolism, contributing further to cold sensitivity.

Thyroid function can also play a role, though Mounjaro does not directly suppress thyroid hormones. However, significant calorie restriction may lead to a mild reduction in T3 (triiodothyronine) conversion, which regulates body temperature [3]. If cold intolerance becomes severe or is accompanied by fatigue, hair loss, or other thyroid symptoms, a thyroid function test should be requested from your prescriber.

How Common Is Cold Sensitivity When Taking Mounjaro for Weight Loss?

Understanding why does Mounjaro make you cold also involves recognising how frequently this side effect occurs. While cold intolerance is not listed among the most common adverse events in the SURPASS clinical trial programme, anecdotal reports from patients and prescribers suggest it affects a notable minority of users, particularly those experiencing rapid weight loss [4].

Cold sensitivity tends to be more pronounced during the initial months of treatment when weight loss is most dramatic and calorie reduction is greatest. Patients losing more than 1-2kg per week appear more likely to report feeling cold, as do those with lower starting body fat percentages. Women may experience this side effect more frequently than men, potentially due to differences in body composition and baseline metabolic rate.

When Cold Sensitivity Typically Appears on Mounjaro

Most patients who wonder why does Mounjaro make you cold notice the symptom between weeks 4-12 of treatment, coinciding with the period of most active weight loss. The sensation may persist for several months before gradually improving as your body adapts to its new weight and metabolic baseline. If cold intolerance appears suddenly after months of stable treatment, it warrants clinical review to rule out other causes such as anaemia or thyroid dysfunction.

Why Does Mounjaro Make You Cold: Metabolic and Hormonal Factors

The metabolic explanation for why does Mounjaro make you cold extends beyond simple calorie reduction. Tirzepatide influences several hormonal pathways that regulate thermogenesis—your body's heat production. GLP-1 receptor activation affects brown adipose tissue (BAT) activity, which is responsible for non-shivering thermogenesis, though research on the net effect remains ongoing [5].

Leptin levels also decline during weight loss, which can reduce metabolic rate and heat production. Leptin, secreted by fat cells, signals energy availability to the brain; lower levels trigger energy conservation mechanisms including reduced thermogenesis. This adaptive response is your body's evolutionary strategy to preserve energy during perceived scarcity, even though you're intentionally restricting calories for therapeutic weight loss.

Blood Flow and Circulation Changes

Another factor explaining why does Mounjaro make you cold involves peripheral blood flow. Some patients on GLP-1 receptor agonists report cooler extremities, possibly due to mild vasoconstriction or reduced cardiac output associated with weight loss and lower metabolic demand. Improved insulin sensitivity and reduced inflammation may also alter microvascular function, though these changes are generally beneficial for long-term cardiovascular health.

Treatment Type Frequency Starting Price
Mounjaro (Tirzepatide) Dual GIP/GLP-1 injection Once weekly from £145.00
Wegovy (Semaglutide) GLP-1 injection Once weekly from £89.00
Wegovy Oral Tablets Semaglutide pill Once daily from £83.00
Saxenda (Liraglutide) GLP-1 injection Once daily from £68.00
Orlistat Fat absorption blocker Three times daily from £32.00

Practical Strategies to Manage Cold Sensitivity on Mounjaro

If you're experiencing why does Mounjaro make you cold as a bothersome symptom, several practical strategies can help. Layering clothing is essential—thermal base layers, insulating mid-layers, and windproof outer layers allow you to adjust to varying indoor and outdoor temperatures. Keeping your extremities warm with gloves, warm socks, and hats helps maintain core temperature, as significant heat loss occurs through the head and hands.

Maintaining adequate calorie intake within your weight loss plan is crucial. While Mounjaro reduces appetite, consuming too few calories can exacerbate cold sensitivity. Work with your prescriber or a registered dietitian to ensure you're meeting minimum nutritional requirements—typically at least 1200 calories daily for women and 1500 for men, though individual needs vary. Including warming foods and beverages such as soups, herbal teas, and warm meals can provide both nutrition and comfort.

Regular physical activity generates metabolic heat and can improve circulation, helping to counteract cold sensitivity. Even moderate exercise like brisk walking for 20-30 minutes daily can make a noticeable difference. Resistance training is particularly beneficial as it preserves muscle mass during weight loss, and muscle tissue generates more metabolic heat than fat tissue.

Why Does Mounjaro Make You Cold: When to Seek Medical Advice

While mild cold sensitivity is generally benign, certain presentations warrant clinical review. If you're wondering why does Mounjaro make you cold and experiencing severe, persistent symptoms that interfere with daily activities, contact your prescriber. Cold intolerance accompanied by extreme fatigue, unexplained weight gain (despite being on Mounjaro), constipation, dry skin, or hair loss may indicate thyroid dysfunction requiring investigation [6].

Similarly, if you develop cold sensitivity alongside dizziness, rapid heartbeat, or shortness of breath, seek prompt medical assessment as these could indicate anaemia, electrolyte imbalances, or cardiovascular issues. Your prescriber may recommend blood tests including full blood count, thyroid function (TSH, free T4, free T3), iron studies, and metabolic panel to rule out underlying causes beyond the expected effects of weight loss.

Adjusting Your Mounjaro Dose

In rare cases where cold sensitivity is severe and other causes have been excluded, your prescriber may consider adjusting your Mounjaro dose or titration schedule. Slowing the rate of weight loss by maintaining a lower dose for a longer period can sometimes reduce temperature-related side effects whilst still achieving therapeutic benefit. However, dose adjustments should only be made under medical supervision, as the standard titration schedule is designed to optimise both efficacy and tolerability.

Comparing Why Does Mounjaro Make You Cold to Other Weight Loss Treatments

The phenomenon of why does Mounjaro make you cold is not unique to tirzepatide—cold sensitivity is reported with other weight loss medications and interventions that cause significant calorie restriction and rapid fat loss. Patients taking Wegovy (semaglutide), another GLP-1 receptor agonist, report similar experiences, as do those following very low-calorie diets or undergoing bariatric surgery [7].

The mechanism is fundamentally the same across these interventions: reduced calorie intake, loss of insulating adipose tissue, and metabolic adaptation. However, the dual agonist action of Mounjaro may produce more pronounced metabolic effects compared to single GLP-1 agonists, potentially explaining why some patients notice cold sensitivity more on tirzepatide than on previous treatments. At Cured Pharmacy, Mounjaro is available from £124.99 following a free online consultation with our UK-registered clinical team, offering competitive UK pricing for this effective weight loss treatment.

Understanding why does Mounjaro make you cold helps contextualise this side effect as a common consequence of successful weight loss rather than a unique drug reaction. Most patients find the symptom manageable with simple lifestyle adjustments and appreciate that it often indicates their treatment is working effectively.

Scientific References

  1. Jastreboff, A. M., Aronne, L. J., Ahmad, N. N., et al. (2022). Tirzepatide once weekly for the treatment of obesity. New England Journal of Medicine, 387(3), 205-216. [accessed 10 September 2026]
  2. Rosenbaum, M., & Leibel, R. L. (2010). Adaptive thermogenesis in humans. International Journal of Obesity, 34(Suppl 1), S47-S55. [accessed 10 September 2026]
  3. Mullur, R., Liu, Y. Y., & Brent, G. A. (2014). Thyroid hormone regulation of metabolism. Physiological Reviews, 94(2), 355-382. [accessed 10 September 2026]
  4. Aronne, L. J., Sattar, N., Horn, D. B., et al. (2022). Continued treatment with tirzepatide for maintenance of weight reduction in adults with obesity: The SURMOUNT-4 randomized clinical trial. JAMA, 331(1), 38-48. [accessed 10 September 2026]
  5. Beiroa, D., Imbernon, M., Gallego, R., et al. (2014). GLP-1 agonism stimulates brown adipose tissue thermogenesis and browning through hypothalamic AMPK. Diabetes, 63(10), 3346-3358. [accessed 10 September 2026]
  6. National Institute for Health and Care Excellence. (2023). Thyroid disease: Assessment and management. NICE guideline [NG145]. [accessed 10 September 2026]
  7. Wilding, J. P. H., Batterham, R. L., Calanna, S., et al. (2021). Once-weekly semaglutide in adults with overweight or obesity. New England Journal of Medicine, 384(11), 989-1002. [accessed 10 September 2026]
  8. NHS. (2026). Tirzepatide: a medicine to manage type 2 diabetes and treat obesity. https://www.nhs.uk/medicines/tirzepatide/ Accessed 10 September 2026.
  9. NHS. (2026). Overweight and obesity in adults. https://www.nhs.uk/conditions/overweight-and-obesity/ Accessed 10 September 2026.
  10. NHS England. (2026). Weight management injections. https://www.england.nhs.uk/ourwork/prevention/obesity/medicines-for-obesity/weight-management-injections/ Accessed 10 September 2026.

Information on this page is for educational purposes only and is not medical advice. All prescription treatments require clinical assessment by a UK-registered prescriber. Always consult a qualified healthcare professional before starting any new medication.

Trusted by thousands

Real people, real results

Jane L.

"Brilliant. Lost 4 stone on mounjaro no side effects at all. Cured pharmacy are excellent. Always helpful pens sent out quickly always comes with needles and sterile wipes. If you want to go on GLP-1 go to cured pharmacy. So professional. Thank you cured pharmacy you changed my health and well being."

Ann-Marie

"I absolutely love this product, I have been using 2.5mg as maintenance dose and have managed to control my weight without any side effects and can still eat well balanced meals. The pharmacy is very efficient friendly and helpful I would not purchase from anywhere else."

Sacha W.

"So far I'm really impressed by my results it's crazy cause I'm not snacking like how I used to do and I see my face slimming down already and it's only been 2 and a half weeks. Can't wait to give my feedback in 5 months time thank you cured pharmacy."

Kimberly G.

"Mounjaro has corrected my hormonal weight gain during menopause. I am using it now to maintain that balance. The results for me have been exceptional!"

Jennifer

"Great really helps cure those nasty habits can't wait for my next mounjaro pen."

How it Works?

Select from our recommended UK-licensed medications.

1

Choose your treatment

Step 1: Choose your treatment from Cured Pharmacy

Select safe UK treatments. Quick answers.

2

Answer quick questions

Step 2: Answer quick consultation questions

We will deliver direct to you as quickly as tomorrow.

3

Get it delivered fast

Step 3: Fast discreet delivery to your door

Start Your Assessment For Weight Loss

Start your journey to better health today.

  • Reviewed by UK-based prescribers
  • Takes under 3 minutes
  • Discreet Packaging

Start Your Journey To Better Health Today

Once you complete a short online assessment you will be able to choose your preferred treatment from safe medically approved options tailored to you.

Start My Assessment

Returning Customer?

Log in to Your Account

Faq

Why does Mounjaro make you cold even in warm environments?
Mounjaro can make you feel cold even in warm environments due to reduced metabolic heat production from lower calorie intake and loss of insulating body fat. Your body's adaptive response to weight loss includes decreased thermogenesis, which affects temperature perception regardless of external conditions.
Does the cold feeling from Mounjaro go away over time?
For most patients, cold sensitivity improves after 3-6 months as your body adapts to its new weight and metabolic baseline. The symptom is typically most pronounced during the period of rapid weight loss and gradually resolves as weight stabilises.
Can I take supplements to reduce why does Mounjaro make you cold?
Ensuring adequate iron, B12, and thyroid function through blood tests is important, as deficiencies can worsen cold intolerance. However, supplements should only be taken if deficiencies are confirmed, as they won't address the fundamental metabolic changes causing temperature sensitivity.
Is feeling cold on Mounjaro a sign the medication is working?
Yes, mild cold sensitivity often indicates significant calorie reduction and active weight loss, both signs that Mounjaro is working effectively. However, it's not experienced by all successful users, so absence of this symptom doesn't mean the treatment isn't working.
Why does Mounjaro make you cold more than other weight loss medications?
Mounjaro's dual GIP/GLP-1 action may produce more pronounced appetite suppression and weight loss compared to single-agonist medications, potentially leading to greater metabolic adaptation and cold sensitivity. However, individual responses vary considerably.
Should I stop Mounjaro if I feel cold all the time?
Mild to moderate cold sensitivity alone is not a reason to stop Mounjaro, as it's manageable with lifestyle adjustments. However, severe symptoms or those accompanied by other concerning signs should be discussed with your prescriber for proper evaluation.
Does drinking warm beverages help with why does Mounjaro make you cold?
Warm beverages provide temporary comfort and can help maintain core temperature, though they don't address the underlying metabolic cause. Regular consumption of warm fluids throughout the day, combined with adequate nutrition and layered clothing, offers practical symptom relief.
Can exercise reduce the cold feeling caused by Mounjaro?
Regular physical activity generates metabolic heat, improves circulation, and helps preserve muscle mass during weight loss, all of which can reduce cold sensitivity. Aim for at least 150 minutes of moderate activity weekly, including resistance training to maintain thermogenic muscle tissue.
Tarun Kumar, Prescribing Pharmacist

Medically reviewed by

Tarun Kumar, Prescribing Pharmacist (GPhC 2233073)

Last reviewed: 10 September 2026

Last updated on 10 September 2026.

Review History

Our experts continually monitor new findings in health and medicine, and we update our articles when new information becomes available.

Why this page was updated on 10 September 2026

Content checked and updated as part of our periodic review, to ensure accuracy and currentness.

Current version (10 September 2026)

Edited by: The Editorial Team

Medically reviewed by:

Tarun Kumar, GPhC No. 2233073, Prescribing Pharmacist


How we source info.

When we present you with stats, data, opinion or a consensus, we'll tell you where this came from.