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mounjaro (autoinjector)

Mounjaro (Autoinjector) (Tirzepatide) is a GLP-1 receptor agonist used to treat Type 2 Diabetes Mellitus.

Tirzepatide · by Eli Lilly and Co

Not yet rated· sourced from the FDA label
Rated against independent regulatory sources·Last updated June 7, 2026·How we rate
Verified againstopenFDANIH DailyMedRxClass

This is one strength of Mounjaro

The FDA label is the same for every strength in this family, so the full page — with all 3 strengths — lives on Mounjaro.

  • MounjaroTirzepatide 10MG/0.5ML (10MG/0.5ML) · Tirzepatide 10MG/2.4ML (4.17MG/ML) · Tirzepatide 12.5MG/0.5ML (12.5MG/0.5ML) · Tirzepatide 15MG/0.5ML (15MG/0.5ML) · Tirzepatide 2.5MG/0.5ML (2.5MG/0.5ML) · Tirzepatide 20MG/2.4ML (8.33MG/ML) · Tirzepatide 30MG/2.4ML (12.5MG/ML) · Tirzepatide 40MG/2.4ML (16.7MG/ML) · Tirzepatide 50MG/2.4ML (20.8MG/ML) · Tirzepatide 5MG/0.5ML (5MG/0.5ML) · Tirzepatide 60MG/2.4ML (25MG/ML) · Tirzepatide 7.5MG/0.5ML (7.5MG/0.5ML)
  • Mounjaro KwikpenTirzepatide 10MG/2.4ML (4.17MG/ML) · Tirzepatide 20MG/2.4ML (8.33MG/ML) · Tirzepatide 30MG/2.4ML (12.5MG/ML) · Tirzepatide 40MG/2.4ML (16.7MG/ML) · Tirzepatide 50MG/2.4ML (20.8MG/ML) · Tirzepatide 60MG/2.4ML (25MG/ML)
  • Mounjaro (Autoinjector) (this page)Tirzepatide 10MG/0.5ML (10MG/0.5ML) · Tirzepatide 12.5MG/0.5ML (12.5MG/0.5ML) · Tirzepatide 15MG/0.5ML (15MG/0.5ML) · Tirzepatide 2.5MG/0.5ML (2.5MG/0.5ML) · Tirzepatide 5MG/0.5ML (5MG/0.5ML) · Tirzepatide 7.5MG/0.5ML (7.5MG/0.5ML)

Key facts

Active ingredient
Tirzepatide
Form
Injectable
Strength
Tirzepatide 10MG/0.5ML (10MG/0.5ML) · Tirzepatide 12.5MG/0.5ML (12.5MG/0.5ML) · Tirzepatide 15MG/0.5ML (15MG/0.5ML) · Tirzepatide 2.5MG/0.5ML (2.5MG/0.5ML) · Tirzepatide 5MG/0.5ML (5MG/0.5ML) · Tirzepatide 7.5MG/0.5ML (7.5MG/0.5ML)
Type
Prescription (Rx)
Brand or generic
Brand-name
Manufacturer
Eli Lilly and Co
Half-life
about 5 days (roughly 120 hours) (how long it stays in your system)
FDA application
NDA215866

What is Mounjaro (Autoinjector)?

From the FDA label:MOUNJARO (tirzepatide) injection, for subcutaneous use, contains tirzepatide, a once weekly GIP receptor and GLP-1 receptor agonist. Tirzepatide is based on the GIP sequence and contains aminoisobutyric acid (Aib) in positions 2 and 13, a C-terminal amide, and Lys residue at position 20 that is attached to 1,20-eicosanedioic acid via a linker. The molecular weight is 4813.53 Da and the empirical formula is C 225 H 348 N 48 O 68 . Structural formula: MOUNJARO is a clear, colorless to slightly yellow, sterile solution for subcutaneous use. Each single-dose pen or single-dose vial contains a 0.5 mL solution of 2.5 mg, 5 mg, 7.5 mg, 10 mg, 12.5 mg, or 15 mg of tirzepatide and the following excipients: sodium chloride (4.1 mg), sodium phosphate dibasic heptahydrate (0.7 mg), and water for injection. Each multi-dose vial or single-patient-use KwikPen contains 2.4 mL of solution, which provides 4 doses of 2.5 mg, 5 mg, 7.5 mg, 10 mg, 12.5 mg, or 15 mg of tirzepatide per 0.6 mL. Each dose contains the following excipients: benzyl alcohol (5.4 mg), glycerin (4.8 mg), phenol (1.08 mg), sodium chloride (1.05 mg), sodium phosphate dibasic heptahydrate (0.8 mg), and water for injection. Hydrochloric acid solution and/or sodium hydroxide solution may have been added to adjust the pH. MOUNJARO has a pH of 6.5 to 7.5. Each single-patient-use KwikPen contains additional volume to allow for…

How to use

The recommended starting dosage is 2.5 mg injected subcutaneously once weekly. ( 2.1 ) After 4 weeks, increase to 5 mg injected subcutaneously once weekly. ( 2.1 ) If additional glycemic control is needed, increase the dosage in 2.5 mg increments after at least 4 weeks on the current dose. ( 2.1 ) Maximum dosage ( 2.1 ): Adults: 15 mg subcutaneously once weekly. Pediatric patients 10 years of age and older: 10 mg subcutaneously once weekly. Administer once weekly at any time of day, with or without meals. ( 2.2 ) Inject subcutaneously in the abdomen, thigh, or another person should inject in the back of the upper arm. Rotate injection sites with each dose. ( 2.2 ) Refer to the Full Prescribing Information for additional important administration instructions about MOUNJARO presentations. ( 2.2 ) 2.1 Recommended Dosage The recommended starting dosage of MOUNJARO is 2.5 mg injected subcutaneously once weekly [see Dosage and Administration ( 2.2 )] . Follow the dosage escalation below to reduce the risk of gastrointestinal adverse reactions [see Warnings and Precautions ( 5.6 ) and Adverse Reactions ( 6.1 )] . The 2.5 mg dosage is for treatment initiation and is not intended for glycemic control. After 4 weeks, increase the dosage to 5 mg injected subcutaneously once weekly. If additional glycemic control is needed, increase the dosage in 2.5 mg increments after at least 4 weeks…

Side effects

The following serious adverse reactions are described below or elsewhere in the prescribing information: Risk of Thyroid C-cell Tumors [see Warnings and Precautions ( 5.1 )] Acute Pancreatitis [see Warnings and Precautions ( 5.2 )] Hypoglycemia with Concomitant Use of Insulin Secretagogues or Insulin [see Warnings and Precautions ( 5.3 )] Hypersensitivity Reactions [see Warnings and Precautions ( 5.4 )] Acute Kidney Injury Due to Volume Depletion [see Warnings and Precautions ( 5.5 )] Severe Gastrointestinal Adverse Reactions [see Warnings and Precautions ( 5.6 )] Diabetic Retinopathy Complications in Patients with a History of Diabetic Retinopathy [see Warnings and Precautions ( 5.7 )] Acute Gallbladder Disease [see Warnings and Precautions ( 5.8 )] Pulmonary Aspiration During General Anesthesia or Deep Sedation [see Warnings and Precautions ( 5.9 )] The most common adverse reactions, reported in ≥5% of patients treated with MOUNJARO are nausea, diarrhea, decreased appetite, vomiting, constipation, dyspepsia, and abdominal pain. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Eli Lilly and Company at 1-800-LillyRx (1-800-545-5979) or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly…

FDA Boxed Warning (the FDA’s most serious warning)

Boxed (black-box) warning — from the FDA label

In both male and female rats, tirzepatide causes dose-dependent and treatment-duration-dependent thyroid C-cell tumors at clinically relevant exposures. It is unknown whether MOUNJARO causes thyroid C-cell tumors, including medullary thyroid carcinoma (MTC), in humans as human relevance of tirzepatide-induced rodent thyroid C-cell tumors has not been determined [see Warnings and Precautions ( 5.1 ) and Nonclinical Toxicology ( 13.1 )]. MOUNJARO is contraindicated in patients with a personal or family history of MTC or in patients with Multiple Endocrine Neoplasia syndrome type 2 (MEN 2) [see Contraindications ( 4 )] . Counsel patients regarding the potential risk for MTC with the use of MOUNJARO and inform them of symptoms of thyroid tumors (e.g., a mass in the neck, dysphagia, dyspnea, persistent hoarseness). Routine monitoring of serum calcitonin or using thyroid ultrasound is of uncertain value for early detection of MTC in patients treated with MOUNJARO [see Contraindications ( 4 ) and Warnings and Precautions ( 5.1 )]. WARNING: RISK OF THYROID C-CELL TUMORS See full prescribing information for complete boxed warning. Tirzepatide causes thyroid C-cell tumors in rats. It is unknown whether MOUNJARO causes thyroid C-cell tumors, including medullary thyroid carcinoma (MTC), in humans as the human relevance of tirzepatide-induced rodent thyroid C-cell tumors has not been determined ( 5.1 , 13.1 ). MOUNJARO is contraindicated in patients with a personal or family history of MTC or in patients with Multiple Endocrine Neoplasia syndrome type 2 (MEN 2). Counsel patients regarding the potential risk of MTC and symptoms of thyroid tumors ( 4 , 5.1 ).

Warnings

Important safety information

Acute Pancreatitis: Has been observed in patients treated with GLP-1 receptor agonists, or MOUNJARO. Discontinue if pancreatitis is suspected. ( 5.2 ) Hypoglycemia with Concomitant Use of Insulin Secretagogues or Insulin: Concomitant use with an insulin secretagogue or insulin may increase the risk of hypoglycemia, including severe hypoglycemia. Reducing dose of insulin secretagogue or insulin may be necessary. ( 5.3 ) Hypersensitivity Reactions: Serious hypersensitivity reactions (e.g., anaphylaxis and angioedema) have been reported. Discontinue MOUNJARO if suspected and promptly seek medical advice. ( 5.4 ) Acute Kidney Injury Due to Volume Depletion: Monitor renal function in patients reporting adverse reactions that could lead to volume depletion. ( 5.5 ) Severe Gastrointestinal Adverse Reactions: Use has been associated with gastrointestinal adverse reactions, sometimes severe. MOUNJARO is not recommended in patients with severe gastroparesis. ( 5.6 ) Diabetic Retinopathy Complications in Patients with a History of Diabetic Retinopathy: Has not been studied in patients with non-proliferative diabetic retinopathy requiring acute therapy, proliferative diabetic retinopathy, or diabetic macular edema. Monitor patients with a history of diabetic retinopathy for progression. ( 5.7 ) Acute Gallbladder Disease: Has occurred in clinical trials. If cholelithiasis is suspected, gallbladder studies and clinical follow-up are indicated. ( 5.8 ) Pulmonary Aspiration During General Anesthesia or Deep Sedation: Has been reported in patients receiving GLP-1 receptor agonists undergoing elective surgeries or procedures. Instruct patients to inform healthcare providers of any planned surgeries or procedures. ( 5.9 ) Never share a MOUNJARO KwikPen between patients, even if the pen needle is changed. ( 5.10 ) 5.1 Risk of Thyroid C-Cell Tumors In both sexes of rats, tirzepatide caused a dose-dependent and treatment-duration-dependent increase in the incidence of thyroid C-cell tumors (adenomas and carcinomas) in a 2-year study at clinically relevant plasma exposures [see Nonclinical Toxicology ( 13.1 )] . It is unknown whether MOUNJARO causes thyroid C-cell tumors, including medullary thyroid carcinoma (MTC), in humans as human relevance of tirzepatide-induced rodent thyroid C-cell tumors has not been determined. MOUNJARO is contraindicated in patients with a personal or family history of MTC or in patients with MEN 2. Counsel patients regarding the potential risk for MTC with the use of MOUNJARO and inform them of symptoms of thyroid tumors (e.g., a mass in the neck, dysphagia, dyspnea, persistent hoarseness). Routine monitoring of serum calcitonin or using thyroid ultrasound is of uncertain value for early detection of MTC in patients treated with MOUNJARO. Such monitoring may increase the risk of unnecessary procedures, due to the low test specificity for serum calcitonin and a high background incidence of thyroid disease. Significantly elevated serum calcitonin values may indicate MTC and patients with MTC usually have calcitonin values >50 ng/L. If serum calcitonin is measured and found to be elevated, the patient should be further evaluated. Patients with thyroid nodules noted on physical examination or neck imaging should also be further evaluated. 5.2 Acute Pancreatitis Acute pancreatitis, including fatal and non-fatal hemorrhagic or necrotizing pancreatitis, has been observed in patients treated with GLP-1 receptor agonists, or MOUNJARO [see Adverse Reactions ( 6 )] . After initiation of MOUNJARO, observe patients carefully for signs and symptoms of acute pancreatitis, which may include persistent or severe abdominal pain (sometimes radiating to the back) and which may or may not be accompanied by nausea or vomiting. If pancreatitis is suspected, discontinue MOUNJARO and initiate appropriate management. 5.3 Hypoglycemia with Concomitant Use of Insulin Secretagogues or Insulin Patients receiving MOUNJARO in combination with an insulin secretagogue (e.g., sulfonylurea) or insulin may have an increased risk of hypoglycemia, including severe hypoglycemia [see Adverse Reactions ( 6.1 ), Drug Interactions ( 7.1 )] . The risk of hypoglycemia may be lowered by a reduction in the dose of sulfonylurea (or other concomitantly administered insulin secretagogue) or insulin. Inform patients using these concomitant medications of the risk of hypoglycemia and educate them on the signs and symptoms of hypoglycemia. 5.4 Hypersensitivity Reactions Serious hypersensitivity reactions (e.g., anaphylaxis, angioedema) have been reported in patients treated with MOUNJARO. If hypersensitivity reactions occur, discontinue use of MOUNJARO; treat promptly per standard of care, and monitor until signs and symptoms resolve. Do not use in patients with a previous serious hypersensitivity reaction to tirzepatide or any of the excipients in MOUNJARO [see Contraindications ( 4 ), Adverse Reactions ( 6.2 )] . Anaphylaxis and angioedema have been reported with GLP-1 receptor agonists. Use caution in patients with a history of angioedema or anaphylaxis with a GLP-1 receptor agonist because it is unknown whether such patients will be predisposed to these reactions with MOUNJARO. 5.5 Acute Kidney Injury Due to Volume Depletion There have been postmarketing reports of acute kidney injury, in some cases requiring hemodialysis, in patients treated with GLP-1 receptor agonists, or MOUNJARO. The majority of the reported events occurred in patients who experienced gastrointestinal adverse reactions leading to dehydration such as nausea, vomiting, or diarrhea [see Adverse Reactions ( 6 )] . Monitor renal function in patients reporting adverse reactions to MOUNJARO that could lead to volume depletion, especially during dosage initiation and escalation of MOUNJARO. 5.6 Severe Gastrointestinal Adverse Reactions Use of MOUNJARO has been associated with gastrointestinal adverse reactions, sometimes severe [see Adverse Reactions ( 6 )] . In the pool of placebo-controlled trials in adults, severe gastrointestinal adverse reactions occurred more frequently among patients receiving MOUNJARO (5 mg 1.3%, 10 mg 0.4%, 15 mg 1.2%) than placebo (0.9%). Severe gastrointestinal adverse reactions have also been reported postmarketing with GLP-1 receptor agonists. MOUNJARO is not recommended in patients with severe gastroparesis. 5.7 Diabetic Retinopathy Complications in Patients with a History of Diabetic Retinopathy Rapid improvement in glucose control has been associated with a temporary worsening of diabetic retinopathy. MOUNJARO has not been studied in patients with non-proliferative diabetic retinopathy requiring acute therapy, proliferative diabetic retinopathy, or diabetic macular edema. Patients with a history of diabetic retinopathy should be monitored for progression of diabetic retinopathy. 5.8 Acute Gallbladder Disease Acute events of gallbladder disease such as cholelithiasis or cholecystitis have been reported in GLP-1 receptor agonist trials and postmarketing. In MOUNJARO placebo-controlled clinical trials in adults, acute gallbladder disease (cholelithiasis, biliary colic, and cholecystectomy) was reported by 0.6% of MOUNJARO-treated patients and 0% of placebo-treated patients. If cholelithiasis is suspected, gallbladder diagnostic studies and appropriate clinical follow-up are indicated. 5.9 Pulmonary Aspiration During General Anesthesia or Deep Sedation MOUNJARO delays gastric emptying [see Clinical Pharmacology ( 12.2 )] . There have been rare postmarketing reports of pulmonary aspiration in patients receiving GLP-1 receptor agonists undergoing elective surgeries or procedures requiring general anesthesia or deep sedation who had residual gastric contents despite reported adherence to preoperative fasting recommendations. Available data are insufficient to inform recommendations to mitigate the risk of pulmonary aspiration during general anesthesia or deep sedation in patients taking MOUNJARO,…

Who should not take Mounjaro (Autoinjector)

MOUNJARO is contraindicated in patients with: A personal or family history of medullary thyroid carcinoma (MTC) or in patients with Multiple Endocrine Neoplasia syndrome type 2 (MEN 2) [see Warnings and Precautions ( 5.1 )] . Known serious hypersensitivity to tirzepatide or any of the excipients in MOUNJARO. Serious hypersensitivity reactions, including anaphylaxis and angioedema, have been reported with MOUNJARO [see Warnings and Precautions ( 5.4 )] . Personal or family history of medullary thyroid carcinoma or in patients with Multiple Endocrine Neoplasia syndrome type 2. ( 4 ) Known serious hypersensitivity to tirzepatide or any of the excipients in MOUNJARO. ( 4 )

Overdose — what happens if you take too much

In the event of an overdosage, consider contacting the Poison Help line (1-800-222-1222) or a medical toxicologist for additional overdosage management recommendations. Initiate appropriate supportive treatment according to the patient's clinical signs and symptoms. A period of observation and treatment for these symptoms may be necessary, taking into account the half-life of tirzepatide of approximately 5 days.

U.S. Poison Control: call or text 1-800-222-1222 (free, 24/7). In an emergency call 911. From the FDA label; not medical advice.

Interactions

MOUNJARO delays gastric emptying and has the potential to impact the absorption of concomitantly administered oral medications. ( 7.2 ) 7.1 Concomitant Use with an Insulin Secretagogue (e.g., Sulfonylurea) or with Insulin When initiating MOUNJARO, consider reducing the dose of concomitantly administered insulin secretagogues (e.g., sulfonylureas) or insulin to reduce the risk of hypoglycemia [see Warnings and Precautions ( 5.3 )]. 7.2 Oral Medications MOUNJARO delays gastric emptying and thereby has the potential to impact the absorption of concomitantly administered oral medications. Caution should be exercised when oral medications are concomitantly administered with MOUNJARO. Monitor patients on oral medications dependent on threshold concentrations for efficacy and those with a narrow therapeutic index (e.g., warfarin) when concomitantly administered with MOUNJARO. Advise patients using oral hormonal contraceptives to switch to a non-oral contraceptive method or add a barrier method of contraception for 4 weeks after initiation and for 4 weeks after each dose escalation with MOUNJARO. Hormonal contraceptives that are not administered orally should not be affected [see Use in Specific Populations ( 8.3 ) and Clinical Pharmacology ( 12.2 , 12.3 )].

How long does Tirzepatide stay in your body?

The elimination half-life of tirzepatide is about 5 days (roughly 120 hours) — the time it takes the body to clear about half of it. As a rule of thumb, a medicine is mostly gone after roughly 4 to 5 half-lives, though this varies from person to person with age and kidney or liver function. This is the elimination half-life of tirzepatide itself; the long duration is what allows once-weekly injection, and the same molecule and half-life apply to both Mounjaro and Zepbound. The FDA label reports no active metabolite with a longer half-life. Individual values can vary somewhat between people.

This is general information, not medical advice. It doesn’t tell you when a drug test would read negative (tests detect substances for different, often longer, windows) or when it’s safe to take another dose — ask your pharmacist or prescriber. Source: MOUNJARO (tirzepatide) injection — FDA Prescribing Information, DailyMed.

Drug class

How this class works, per Glucagon-Like Peptide-1 Receptor Agonists - StatPearls - NCBI Bookshelf.

May treat (source: NIH RxClass)

See how Mounjaro (Autoinjector) ranks — best-rated GLP-1 receptor agonist for:

Dosage forms

Injectable

The forms currently marketed in the U.S., per the FDA National Drug Code Directory.

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Frequently asked questions

What does Mounjaro (Autoinjector) treat?
Mounjaro (Autoinjector) (Tirzepatide) may be used to treat type 2 diabetes mellitus, based on NIH RxClass drug-classification data (conditions a drug may treat — not a verbatim copy of the FDA-approved label). This is general reference, not medical advice.
How does Mounjaro (Autoinjector) work?
Mounjaro (Autoinjector) is a GLP-1 receptor agonist. GLP-1 receptor agonists mimic the gut hormone GLP-1: they prompt the pancreas to release insulin when blood sugar is high, curb the release of glucagon, and slow stomach emptying, which lowers blood sugar and reduces appetite.
Is there a coupon or discount for Mounjaro (Autoinjector)?
pharmaranks is an independent ratings site, not a pharmacy — we don't issue coupons or sell Mounjaro (Autoinjector). To pay less, ask your prescriber or pharmacist whether a generic equivalent exists, check the manufacturer's copay/savings card and patient-assistance program, and compare a pharmacy discount card against your insurance copay. Prices vary by pharmacy, insurance, and location, so always confirm at the counter. This is general reference, not medical or financial advice.
Who makes Mounjaro (Autoinjector)?
Mounjaro (Autoinjector) is marketed by Eli Lilly and Co. You can see Eli Lilly and Co's full profile, rating, and other products on pharmaranks.
Is Mounjaro (Autoinjector) a brand-name or generic drug?
Mounjaro (Autoinjector) is a brand-name product with the active ingredient Tirzepatide.
Is Mounjaro (Autoinjector) available over the counter?
No. Mounjaro (Autoinjector) is a prescription (Rx) medication in the US — you need a prescription from a licensed clinician (in person or via telehealth); it isn't sold over the counter. For some conditions there are OTC alternatives — ask your pharmacist.
What forms does Mounjaro (Autoinjector) come in?
Mounjaro (Autoinjector) is currently marketed as injectable, per the FDA's National Drug Code Directory.
What class of drug is Mounjaro (Autoinjector)?
Mounjaro (Autoinjector) is classified as glp-1 receptor agonist, glucose-dependent insulinotropic polypeptide receptor agonist, per the FDA's Established Pharmacologic Class.
Is Mounjaro (Autoinjector) FDA-registered?
Mounjaro (Autoinjector) is on record with the U.S. FDA under application number NDA215866. You can verify this on its official FDA label.
Is Mounjaro (Autoinjector) safe?
There's no single safe-or-not verdict, and we don't yet have a composite recall-safety score for Mounjaro (Autoinjector). Review its FDA-label side effects and warnings below, and always consult a licensed professional.
What are the side effects of Mounjaro (Autoinjector)?
Mounjaro (Autoinjector)'s side effects are taken directly from its FDA label. From the label: The following serious adverse reactions are described below or elsewhere in the prescribing information: Risk of Thyroid C-cell Tumors [see Warnings and Precautions ( 5.1 )] Acute Pancreatitis [see Warnings and Precautions ( 5.2 )] Hypoglycemia with Concomitant Use of Insulin Secretagogues or Insuli… Both common and serious reactions are documented in full on this page. This is general reference from the FDA, not medical advice — always consult a professional.

Clinical content sourced from the FDA label via openFDA (U.S. FDA). View the FDA label on DailyMed → Provided for general reference only — not medical advice. Always consult a licensed professional and the current prescribing information.

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