Tirzepatide Injection: Uses, Dosage, Side Effects, Precautions and Alternates

Quick overview

Tirzepatide Injection, generically called tirzepatide, is an incretin mimetic used to help manage type 2 diabetes and support weight loss. It is the only medicine that acts on both the GIP and GLP-1 gut hormone receptors. It is given as a once-weekly injection under the skin and is available as a solution in a vial or as a single-patient-use Kwikpen.

What is Tirzepatide Injection

Tirzepatide is an injectable prescription medicine used to help manage type 2 diabetes and to support weight loss. It belongs to a class of medicines called incretin mimetics, and it is the only medicine that acts on both the GIP and GLP-1 gut hormone receptors.

Tirzepatide Injection uses

• Controls blood sugar levels in certain adults with type 2 diabetes
• Treats obstructive sleep apnea in adults with obesity
• Helps with weight loss in people who are obese or overweight and have weight-related health problems
• Lowers the risk of serious heart problems (such as heart attack or stroke) in certain adults with type 2 diabetes who are at high risk

Benefits of Tirzepatide Injection

• Can lead to significant and sustained weight loss
• Helps lower blood sugar (A1C) levels
• May lower the chances of heart attack, stroke, and other diabetes-related complications such as kidney failure, nerve damage, and eye problems
• Can improve blood pressure, cholesterol, and other cardiometabolic markers

How Tirzepatide Injection works

Tirzepatide copies two natural gut hormones, GIP and GLP-1. It helps your pancreas release the right amount of insulin when blood sugar is high, slows down how fast your stomach empties, and acts on brain areas that control hunger and cravings. This helps lower blood sugar and can reduce appetite, leading to weight loss.

Tirzepatide Injection dosage

Tirzepatide is given as an injection under the skin once a week, with or without meals, at any time of day. Use exactly as directed by your doctor; do not use more, less, or more often than prescribed. Your doctor will likely start you on a low dose and raise it gradually, no more than once every 4 weeks. It may take several weeks before you feel the full benefit; keep using it even if you feel well, and do not stop without talking to your doctor first.

You will be shown how to use the pen, Kwikpen, or vial by your doctor or nurse — follow the instructions for use carefully. Do not share your Kwikpen with anyone, since this can increase the risk of infection. Inject into the abdomen, thigh, or upper arm, and rotate the injection site with each dose. You can change the day of the week you inject, as long as at least 3 days have passed since your last dose.

If you also use insulin, you can inject it in the same body area as tirzepatide, but not right next to it, and do not mix the two in the same injection. Always check that the solution is clear and colorless to slightly yellow before injecting; do not use it if it looks cloudy, frozen, discolored, or has particles in it, or if it is past its expiration date. Never reuse or share needles; remove the needle right after injecting and dispose of it in a puncture-resistant container.

If you miss a dose, inject it as soon as you remember, as long as it has been 4 days or less since the missed dose; if more than 4 days have passed, skip that dose and continue your regular schedule; do not inject two doses within 3 days of each other. Continue your normal diet unless your doctor tells you otherwise; you will also need to follow a healthy, balanced diet alongside treatment.

Available forms and strengths

• Solution (liquid) in a vial
• Single-patient-use Kwikpen

Side effects of Tirzepatide Injection

Common

• Nausea, vomiting, diarrhea
• Decreased appetite
• Constipation
• Upset stomach
• Stomach pain
• Feeling tired
• Itchy or red skin where you inject
• Hair loss

Serious

• Stomach pain that will not go away (and may spread to the back), with or without vomiting
• Swelling of the face, throat, or around the mouth or eyes; hives; rash; itching; trouble swallowing or breathing; dizziness; or a rapid heartbeat (signs of an allergic reaction)
• Lump or swelling in the neck, hoarseness, trouble swallowing, or shortness of breath (possible signs of thyroid tumor)
• Low blood sugar, which can cause headaches, vision problems, feeling dizzy, weak or confused, a fast heartbeat, or sweating
• An inflamed pancreas (acute pancreatitis), causing severe stomach or back pain that does not go away

Warnings and precautions

• Tell your doctor if you are pregnant, plan to become pregnant, or become pregnant while using this medicine. It is not used during pregnancy because there isn't enough information to confirm it's safe for the baby. If you want to become pregnant, stop using it at least 4 weeks before trying.
• Tell your doctor if you are breastfeeding. This medicine is not used while breastfeeding because it is not known whether it passes into breast milk.
• Tell your doctor if you have or have ever had kidney disease before starting this medicine.
• It's best to avoid alcohol while using this medicine, because it can increase side effects like nausea or vomiting.
• If you feel dizzy or have vision problems after using this medicine, do not drive, ride a bike, or use machinery until these effects go away.
• This medicine may raise the risk of thyroid tumors, including a type of thyroid cancer. It caused thyroid tumors in rats, though it is not known if it raises this risk in humans. Tell your doctor if you or a family member has had thyroid cancer or Multiple Endocrine Neoplasia syndrome type 2 (MEN 2), since your doctor may tell you not to use this medicine. Call your doctor right away if you notice a lump or swelling in your neck, hoarseness, trouble swallowing, or shortness of breath.
• This medicine may make hormonal birth control (pills, patches, rings, injections) less effective. Use an additional barrier method of birth control, such as condoms, for 4 weeks after starting treatment and for 4 weeks after each dose increase.
• This medicine may not be suitable if you have had an allergic reaction to it or another GLP-1 agonist, or if you have or have had an inflamed pancreas (acute pancreatitis).
• If you are having any surgery, including dental surgery, let the doctor or dentist know you are using this medicine.
• This medicine can interact with other diabetes medicines, some blood-clot prevention medicines, and insulin, among others. Tell your doctor or pharmacist about all medicines, herbal remedies, vitamins, and supplements you take.

Storage

• Store in the refrigerator between 36 to 46 degrees Fahrenheit
• Keep tirzepatide in its original carton until use to protect it from light
• Single-dose pens or vials can be stored at room temperature for 21 days if needed
• Do not return vials or pens to the refrigerator once they have been stored at room temperature
• Keep all medication out of sight and reach of children; always lock safety caps and store in a place up and away and out of their sight and reach
• Dispose of unneeded medication so pets, children, and other people cannot take it; do not flush it down the toilet; use a medicine take-back program and ask your pharmacist about options in your community

When to see a doctor

• Stop using this medicine and call your doctor right away if you have stomach pain that will not go away (possibly spreading to your back), with or without vomiting, or signs of an allergic reaction such as swelling of the face, throat, or around the mouth or eyes, hives, rash, itching, trouble swallowing or breathing, dizziness, or a rapid heartbeat.
• Call your doctor immediately if you notice a lump or swelling in your neck, hoarseness, trouble swallowing, or shortness of breath.
• Get medical help if you use more than your prescribed dose, as this can sometimes be dangerous. If you've collapsed, had a seizure, have trouble breathing, or can't be woken up, seek emergency help immediately.
• Seek urgent medical care for severe stomach or back pain that does not go away, which could be a sign of an inflamed pancreas, or severe tummy pain, which could signal gallbladder problems.

Alternatives

• Dulaglutide
• Liraglutide
• Semaglutide