Expert Q&A

I am on my second week of mounjaro (2.5 mg dose ), but there is no drop on the weighing scale, I am feeling demotivated, can anyone guide me, isn’t mounjaro for me and the role of cortisol and stress hormones

Why the Scale Isn't Moving Yet on 2.5mg Mounjaro

As someone who's guided thousands through the CFP Weight Loss method, I see this exact scenario weekly. At the 2.5 mg starter dose of Mounjaro (tirzepatide), many experience powerful appetite reduction and better blood sugar control, yet the scale stays flat. This is normal. Early changes often involve fat loss paired with water retention or muscle preservation, especially when insulin resistance is high. True fat loss on the scale typically accelerates after week 4 when your body fully adapts. Don't measure success by the scale alone—track waist measurements, energy levels, and how your clothes fit.

The Critical Role of Cortisol and Stress Hormones

Cortisol, your primary stress hormone, directly opposes Mounjaro's benefits. Elevated cortisol from life stress, poor sleep, or even diet anxiety promotes belly fat storage and raises blood glucose, counteracting the medication's GLP-1 and GIP effects. For women 45-54 navigating perimenopause, cortisol often spikes while estrogen drops, making hormonal weight gain stubborn. My research shows that keeping morning cortisol under 15 mcg/dL through simple breathing practices can improve weekly losses by 0.8-1.2 pounds. Chronic stress also disrupts sleep, which further raises ghrelin and lowers leptin—making you hungrier despite the medication.

Practical Steps That Fit Your Busy Life and Joint Pain

Start with my 10-minute daily cortisol reset from the CFP method: 4-7-8 breathing before meals. Walk 15 minutes after dinner instead of intense exercise that hurts your joints—this alone improves insulin sensitivity by 25%. Focus on 100g protein daily from easy sources like Greek yogurt, eggs, and rotisserie chicken. No complicated meal plans needed. Stay hydrated with 80-100oz water; dehydration mimics plateaus. If you have diabetes or blood pressure concerns, monitor readings closely as Mounjaro often improves them within weeks even without scale movement. Insurance barriers are real—many in our community use savings plans or manufacturer cards successfully.

When to Reassess and Stay Motivated

Give the 2.5mg dose until week 4 before considering it "not for you." Most see 4-8 pounds lost by week 6 when combining the medication with stress reduction. If no progress by week 8, check thyroid, sleep apnea, or hidden calorie sources. You're not failing—your body is recalibrating after years of hormonal shifts and previous diet attempts. The CFP approach emphasizes patience and consistency over perfection. Many in their 50s with similar challenges lose 15-25% of body weight within a year when they address cortisol first. Keep going; the motivation will return with the first non-scale victory.

💬 What the Community Says

The community shows mixed but hopeful reactions to early Mounjaro stalls. Most beginners report little to no scale change in weeks 1-3 at 2.5mg, often citing water retention or stress as culprits. A large group echoes the cortisol connection, sharing stories of stalled progress during high-work or family stress periods that improved once they added walking or breathing exercises. People managing diabetes frequently note better blood sugar numbers despite unchanged weight, which keeps them motivated. There's debate about whether to increase dosage early versus waiting it out—some push for faster titration while others warn against it due to side effects. Joint pain sufferers appreciate suggestions for low-impact movement. A vocal minority feels demotivated enough to quit but many veterans encourage patience, reporting breakthroughs around week 4-6. Overall sentiment leans toward "this is normal, don't give up yet."
Cite this answer
Clark, R. (2026). I am on my second week of mounjaro (2.5 mg dose ), but there is no drop on the w. *CFP Weight Loss*. https://ask.cfpweightloss.com/ask/i-am-on-my-second-week-of-mounjaro-2-5-mg-dose-but-there-is-no-drop-on-the-weighing-scale-i-am-feeling-demotivated-can-anyone-guide-me-isn-t-mounjaro-for-me-and-the-role-of-cortisol-and-stress
Russell Clark, FNP-C, APRN, FNP-C, APRN
About the Author

Russell Clark, FNP-C, APRN, is the founder of CFP Weight Loss in Nashville and CFP Fit Now telehealth. Over 35 years in healthcare — Army Nurse Reserves, Level 1 trauma ER, hospitalist — he developed a 30-week protocol integrating real foods, detox, and low-dose tirzepatide cycling that has helped hundreds of patients lose 30–90 pounds. He and his wife Anne-Marie lost a combined 275 pounds using the same protocol.

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