Mounjaro Dosage Chart for Weight Loss: A Complete Guide

Last reviewed: July 10, 2026

Last updated: July 10, 2026

Written by: Jay Hastings, CEO of PlexusDx

Jay Hastings is the CEO of PlexusDx, a precision health company focused on genetic testing, blood biomarker insights, and personalized wellness recommendations. He has more than 20 years of experience across healthcare innovation, genomics, laboratory operations, healthcare investing, and strategic finance.

Medically reviewed by: Jayden Lee, PharmD, EMBA

Jayden Lee, PharmD, EMBA, is the PlexusDx Medical Science Liaison with a PharmD and MBA specializing in pharmacogenomics and clinical product development, with a proven ability to bridge the gap between genomic research and practical patient outcomes. Dr. Lee has more than 10 years of professional experience in clinical pharmacy, academia, and research.

This article is part of the PlexusDx Education Hub — science-backed guidance on GLP-1 medications, metabolic health, and precision weight management.

Tirzepatide is a dual GLP-1 and GIP receptor agonist that has demonstrated average weight loss of 20-22% in clinical trials when combined with lifestyle changes. Treatment typically begins with a low starting dose, then increases every four weeks based on tolerance and response. Understanding how dosing works helps you prepare for your personalized weight loss journey with PlexusDx.

How Tirzepatide Dosing Works for Weight Loss

Tirzepatide dosing starts low and builds gradually to minimize side effects while maximizing weight loss results. Your initial dose depends on several factors, including your current weight, metabolic health, and prior experience with GLP-1 medications. PlexusDx providers assess these factors during your initial consultation to recommend your starting point, which typically ranges from 2.5 to 5 milligrams weekly.

The medication comes as a weekly subcutaneous injection that you self-administer at home. Each dose is delivered via a pre-filled pen or syringe, making the process straightforward and consistent. Your healthcare provider tracks your weight loss, appetite suppression, and any side effects at regular check-ins to determine if dose increases are appropriate for your goals.

Unlike some pricing models, PlexusDx uses flat monthly rates for tirzepatide injections starting at $289/mo (or $249/mo on the 6-month plan). This means your dose may need to go up, but your price won't—removing financial barriers to reaching your optimal therapeutic level. The medication remains the same price whether you're at your starting dose or at a higher maintenance level.

Standard Tirzepatide Titration Schedule and Timeline

Most patients follow a gradual four-week titration schedule that allows the body to adapt and minimizes nausea and gastrointestinal side effects. The typical progression moves from a starting dose upward in increments, with each level held for four weeks before potential advancement. This measured approach helps your body build tolerance while steadily increasing appetite suppression and metabolic effects.

Titration duration typically spans 8 to 16 weeks to reach a maintenance dose where weight loss plateaus at an acceptable rate. Some patients reach their ideal dose within two months, while others benefit from slower increases over four months or longer. PlexusDx providers customize your timeline based on how well you tolerate each dose level and how your weight responds.

During the titration phase, maintaining consistent weekly injection timing and documenting your hunger levels, energy, and any nausea helps your provider make informed decisions about advancing doses. Many patients notice appetite suppression beginning within days of their first injection, though weight loss acceleration typically becomes visible within the first 2-4 weeks.

Finding Your Optimal Tirzepatide Maintenance Dose

Your maintenance dose is the dose level where you experience meaningful weight loss without intolerable side effects. This dose is highly individual—some patients lose weight effectively at lower doses while others require higher amounts to achieve their goals. PlexusDx providers use both clinical assessment and genetic insights to guide this determination.

The PlexusDx Precision Peptide Genetic Test analyzes GLP1R (rs6923761), and GIPR (rs1800437) — variants that relate to GLP-1 and related signaling pathways. It does not predict your response to tirzepatide or determine your dose; it offers pathway-level context for a conversation with your provider. Genetics is a guide, not a guarantee.

Maintenance doses typically range from 5 to 15 milligrams weekly, though some patients thrive at lower doses and others benefit from maximum doses. Your provider reassesses every 4-8 weeks during the first several months, then moves to longer intervals once your dose and weight loss rate stabilize. If you plateau despite being at a comfortable dose, your provider may recommend staying consistent rather than increasing further, or exploring combination therapies.

Tirzepatide Dosing: Factors Affecting Your Personal Plan

Your tirzepatide dose is influenced by body weight, kidney function, prior medication use, and metabolic conditions. Patients with higher starting weights sometimes tolerate and benefit from higher doses, though this isn't universal. Your age, activity level, and overall health status also inform the starting point and pace of titration your PlexusDx provider recommends.

Side effect tolerance is the primary driver of individual dose adjustments. Nausea, vomiting, or appetite loss so severe that eating becomes difficult signals a need to hold your dose or move to the next increase more slowly. Conversely, minimal side effects and steady weight loss suggest your body is adapting well and dose increases may proceed as planned.

PlexusDx patients have access to telehealth check-ins that allow quick adjustments if side effects become bothersome or if you're not seeing expected results. Your provider can recommend dose reductions, pause periods, or complementary strategies—all while your flat $249/month price remains unchanged. This flexibility removes pressure to advance doses before you're ready or to quit therapy if temporary adjustments would help you succeed.

Comparing Tirzepatide to Semaglutide for Weight Loss Dosing

Tirzepatide activates both GLP-1 and GIP pathways, making it a dual-action medication, while semaglutide activates only the GLP-1 pathway. This dual mechanism gives tirzepatide a small clinical edge in weight loss—trials show tirzepatide produces roughly 2-3% greater weight loss than semaglutide at comparable doses. Both are delivered as weekly injections, and both begin at low doses and titrate upward.

Semaglutide dosing typically tops out at 2.4 milligrams weekly, while tirzepatide reaches 15 milligrams weekly, offering more gradual dose progression options. Some patients who don't tolerate or respond well to semaglutide find tirzepatide more effective, and vice versa. PlexusDx offers compounded versions of both medications at transparent flat pricing—semaglutide injections start at $189/mo (or $149/mo on the 6-month plan) and tirzepatide injections start at $289/mo (or $249/mo on the 6-month plan), allowing you and your provider to select the best fit for your body and goals.

The PlexusDx Precision Peptide Genetic Test analyzes GLP1R, GIPR, FTO, and MC4R — variants that relate to GLP-1 and related signaling pathways. It does not predict your response to tirzepatide or determine your dose; it offers pathway-level context for a conversation with your provider. Genetics is a guide, not a guarantee.

How Your Genetics Relate to GLP-1 Pathways

Not everyone responds to GLP-1 medications the same way. Genetic variants — including GIPR rs1800437, GLP1R rs6923761, FTO rs9939609, and MC4R rs17782313 — relate to the biological pathways these medications act on. These are pathway-level associations only and do not predict how much weight you will lose or how you will respond to any specific medication. PlexusDx maps 14 pathways, 49 peptides, and 150+ genetic insights so you and your provider can see how your genes relate to these pathways. It does not recommend, prescribe, or determine which medication, dose, or peptide is right for you. The PlexusDx Precision Peptide Genetic Test ($99 add-on after your first month of treatment) gives you and your provider pathway-level genetic context to support a more personalized conversation. Genetics is a guide, not a guarantee.

Access Personalized GLP-1 Care Through PlexusDx

PlexusDx offers six prescription GLP-1 protocols to all 50 states — no membership, no insurance required, async intake or live consult. The Tirzepatide Injection starts at $289/mo. Medications are dispensed from licensed 503A compounding pharmacies following strict quality and safety standards. Add a Precision Peptide Genetic Test for $99 to personalize your protocol from day one.

Frequently Asked Questions

What is the typical starting dose of tirzepatide for weight loss?

Most patients begin tirzepatide at 2.5 or 5 milligrams once weekly, depending on their weight, metabolic health, and prior GLP-1 experience. PlexusDx providers assess your individual factors during your initial consultation to recommend the best starting point for your body. Regardless of starting dose, your compounded tirzepatide injection costs a flat $289/mo (or $249/mo on the 6-month plan).

How often does tirzepatide dose increase during treatment?

Tirzepatide doses typically increase every four weeks if you tolerate the current dose well and are experiencing adequate weight loss. Your PlexusDx provider monitors your progress via telehealth check-ins and adjusts the timeline based on your response and any side effects. Most patients reach their optimal maintenance dose within 8-16 weeks of starting therapy.

Will my PlexusDx tirzepatide cost change if my dose increases?

No. PlexusDx compounded tirzepatide injections are priced at a flat rate starting at $289/mo (or $249/mo on the 6-month plan) regardless of your dose level. This transparent pricing means your dose may need to go up, but your price won't—removing financial barriers to reaching your optimal therapeutic level. All PlexusDx medications are HSA/FSA eligible and require no insurance or membership fee.

What side effects should I expect at different tirzepatide doses?

Nausea, vomiting, and reduced appetite are most common during dose increases and typically ease within days as your body adapts. Constipation and fatigue occur in some patients but often improve with hydration and gradual increases in fiber intake. Serious side effects are rare; if you experience severe or persistent symptoms, contact your PlexusDx provider immediately for dose adjustment guidance.

How does the Precision Peptide Genetic Test help with my tirzepatide dosing?

No — the Precision Peptide Genetic Test does not predict your response to tirzepatide or any specific medication. It analyzes pathway-level variants (GLP1R, and GIPR) that relate to the biology involved, offering context for a conversation with your provider rather than a prediction.

Related Reading

• Mounjaro For Weight Loss 2
• Glp 1 Dosage For Weight Loss
• Weight Loss Mounjaro
• Mounjaro Weight Loss By Week

Pricing and availability current as of July 2026. Compounded GLP-1 medications are not FDA-approved drug products; they are prepared by licensed compounding pharmacies under federal compounding regulations. Compounded semaglutide and tirzepatide are not the same as Wegovy, Ozempic, Zepbound, or Mounjaro. This article is for informational purposes only and does not constitute medical advice. Consult a licensed healthcare provider before starting, stopping, or changing any medication.

Return to the PlexusDx Education Hub for more evidence-based resources on GLP-1 therapy, metabolic health, and personalized weight management.

Medical and Editorial Standards

Medical review process: This article was reviewed for medical accuracy, scientific clarity, evidence alignment, and appropriate discussion of genetics, medications, supplements, biomarkers, and health-related claims.

Sources and evidence: PlexusDx educational content is developed using peer-reviewed research, clinical literature, reputable medical references, and, where applicable, public health or regulatory guidance.

Commercial transparency: PlexusDx offers genetic testing, blood biomarker testing, personalized supplement recommendations, and related precision wellness services. Product mentions are intended to help readers understand available options and should not be interpreted as medical advice.

Important disclaimer: PlexusDx educational content is for informational purposes only and should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about medications, supplements, genetic testing, lab testing, or health-related care.