Description
What is Mounjaro ?
Mounjaro is a prescription injectable medication that can assist adults with obesity, or those who are overweight and dealing with weight-related health issues, in losing weight and maintaining weight loss. It is also effective for patients with type 2 diabetes in managing high blood sugar levels.
The Mounjaro KwikPen is a disposable, pre-filled pen intended for single-patient, multi-dose use. Each pen holds enough medication for 4 weekly doses, meaning you will need one pen per month.
How Mounjaro Works?
Mounjaro contains tirzepatide as its active ingredient. Tirzepatide helps reduce your appetite, making you feel full for longer. This decrease in hunger leads to fewer food cravings, and by eating less, it aids in weight loss.
Directions
Always use Mounjaro exactly as directed in the patient information leaflet or as advised by your doctor or Fylde Clinic pharmacist.
Mounjaro should be taken once a week on the same day, though you can choose any time during that day for your injection. If needed, you can change the day of your weekly dose, ensuring that there is at least a 7-day gap between doses.
If you miss a dose, take it as soon as possible within 96 hours (4 days). If more than 4 days have passed, skip the missed dose and continue with your next scheduled dose. Do not take two doses within 72 hours (3 days) of each other.

Supplies Needed for Mounjaro Injection:
- Mounjaro KwikPen
- A compatible KwikPen needle
- An alcohol swab
- A gauze pad or cotton ball
- A sharps disposal container
How to Use Your Mounjaro KwikPen ?
- Preparation: Begin by washing your hands thoroughly with soap and water. Remove the pen cap and inspect the pen and label. Do not use the pen if:
- The medication name or dose does not match your prescription.
- The pen is expired, damaged, or has been frozen.
- The liquid contains particles, is cloudy, or discolored (it should be colorless or slightly yellow).
- Attaching the Needle: Wipe the red inner seal with an alcohol swab. Take a new pen needle (4 needles are provided with your Mounjaro KwikPen) and remove the paper tab from the outer needle shield. Attach the capped needle by pushing it straight onto the pen and twisting it until secure. Remove and keep the outer needle shield for later use, then dispose of the inner needle shield in a household bin.
- Priming the Pen: Turn the dose knob until you hear two clicks and see the extended line in the dose window. Adjust if necessary until the correct position aligns with the dose indicator. Hold the pen with the needle pointing upwards and gently tap the cartridge holder to collect any air bubbles at the top. Push the dose knob in fully and hold it for a slow count of five. The ‘0’ icon should be visible in the dose window. If you do not see liquid emerge from the needle, repeat the priming steps up to two more times. If the issue persists, change the needle and repeat the priming process one more time. If no liquid appears, consult your healthcare provider.
- Injecting the Medication: Select an injection site on your stomach (abdomen), thigh, or upper arm. Rotate injection sites weekly, using a different area within the same region if needed. Turn the dose knob until it stops and the ‘1’ icon appears in the dose window. Insert the needle into your skin, press the dose knob in fully, and hold for a slow count of five. Ensure the ‘0’ icon appears in the dose window before removing the needle.
- After the Injection: If you notice bleeding, lightly press the injection site with a gauze pad or cotton ball—do not rub the area. Carefully replace the outer needle shield and unscrew the capped needle, disposing of it in a sharps container. Do not store the pen with the needle attached, as this can cause leakage, blockages, or air entry into the pen. Replace the pen cap before storing.
Disposing of Your Mounjaro KwikPen and Needles
Used needles must be placed in a sharps disposal container immediately after use. Do not dispose of needles in household waste to prevent injury and contamination. Once you have used your Mounjaro KwikPen four times (one month’s use), discard the pen (without the needle) in your regular household bin.
For further details, including illustrated instructions, refer to the patient information leaflet.
Side Effects
Like all medications, Mounjaro may cause side effects in some individuals, though not everyone will experience them. Common side effects include:
- Nausea
- Vomiting
- Abdominal pain
- Diarrhea
- Indigestion
- Belching
- Reactions at the injection site
- Hair loss
For a full list of potential side effects, please refer to the patient information leaflet. If you experience any side effects, including those not listed in the leaflet, you can report them through the MHRA Yellow Card Scheme.
Serious Side Effects
Seek immediate medical attention if you develop signs of a severe allergic reaction, such as swelling of the face or throat, a skin rash, difficulty breathing, or loss of consciousness.
Some individuals using Mounjaro have reported severe stomach issues. Inform your healthcare provider if you experience persistent or severe stomach problems.
Nausea, vomiting, and diarrhea can lead to dehydration, which may cause kidney complications. Ensure you stay hydrated by drinking plenty of fluids.
Gallbladder issues have also been reported in some users of Mounjaro. Contact your healthcare provider immediately if you experience symptoms such as:
- Upper abdominal pain
- Yellowing of the skin or eyes (jaundice)
- Fever
- Pale or clay-colored stools
Additionally, inflammation of the pancreas (pancreatitis) is a potential risk. Stop using Mounjaro and seek medical advice if you develop severe, persistent abdominal pain, with or without vomiting, which may radiate to your back.
Patients with type 2 diabetes may experience vision changes while taking Mounjaro. Inform your healthcare provider if you notice any alterations in your vision.
It is also important to monitor your mental health while using this medication. If you experience any new or worsening mood changes, behavioral shifts, or troubling thoughts, contact your healthcare provider promptly.
Warnings
Mounjaro may be unsuitable for certain people. Do not use this medicine if you are allergic to tirzepatide or any of the other listed ingredients.
Do not use Mounjaro if you or any of your family have ever had a type of thyroid cancer called MTC or if you have an endocrine system condition called MEN 2.
Talk to your doctor or pharmacist before taking this medicine if you:
- Have or have had problems with your pancreas or kidneys
- Have severe problems with your stomach, such as slowed emptying of your stomach (gastroparesis) or problems with digesting food
- Have a history of diabetic retinopathy
Using/taking other medicines
You must tell your doctor or pharmacist about all the medicines you take, including prescription and over-the-counter (OTC) medicines, vitamins and herbal supplements before using Mounjaro.
This is because Mounjaro may affect the way some medicines work, and some medicines may affect the way Mounjaro works.
Your risk for getting low blood sugar may be higher if you use Mounjaro with medicines that can cause low blood sugar, such as a sulfonylurea or insulin. Signs and symptoms of low blood sugar may include:
- Dizziness or light-headedness
- Blurred vision
- Anxiety
- Irritability
- Mood changes
- Sweating
- Slurred speech
- Hunger
- Confusion
- Drowsiness
- Shakiness
- Weakness
- Headache
- Fast heartbeat
- Feeling jittery
Age restrictions
Mounjaro is only suitable for adults aged 18 years and over.
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