Tirzepatide is a once-weekly subcutaneous injection. The technique is simple — but the dosing schedule, injection technique, and storage requirements matter. Here's the complete practical guide based on FDA prescribing information.
Standard dosing schedule
Weeks 1–4: 2.5 mg once weekly (initiation dose, not for clinical effect)
Weeks 5–8: 5 mg once weekly
Weeks 9–12: 7.5 mg once weekly (optional intermediate step)
Weeks 13–16: 10 mg once weekly
Weeks 17–20: 12.5 mg once weekly (optional intermediate step)
Week 21 onward: 15 mg once weekly (maximum maintenance dose)
Many clinicians use slower titration when GI side effects are limiting. Some patients maintain on intermediate doses (5, 7.5, 10, 12.5 mg) long-term if response and tolerability are adequate.
Standard tirzepatide titration schedule (2.5 → 15 mg).
Choosing your weekly injection day
Pick any day of the week and inject at approximately the same time each week. Most patients choose a day they're typically home and not traveling. Sunday evenings and Saturday mornings are popular because GI side effects, if they occur, peak roughly 24–48 hours after the dose. If you need to change your weekly injection day, ensure at least 3 days (72 hours) between doses.
Where to inject
Abdomen: At least 2 inches away from the navel. Most absorbable; often most comfortable.
Upper thigh: Front or outer aspect of the upper thigh.
Upper arm: Back of the upper arm (may require a helper).
Rotate sites with each injection to avoid lipohypertrophy and skin irritation.
Injection technique (step by step)
Remove medication from refrigerator and let warm to room temperature for 10–15 minutes
Wash hands with soap and water
Inspect the medication — it should be clear and colorless. Do not use if cloudy or containing particles.
Clean the injection site with an alcohol wipe and let air-dry
If using a vial: draw the prescribed dose into an insulin syringe
Pinch a fold of skin between thumb and forefinger
Insert the needle at a 45–90 degree angle
Slowly inject the medication
Wait 5 seconds, then withdraw the needle
Apply a clean cotton ball or gauze if any bleeding occurs (do not rub)
Dispose of the needle in an FDA-cleared sharps container
Missed dose handling
If the next scheduled dose is more than 3 days away: Administer the missed dose as soon as you remember, then resume the regular weekly schedule.
If the next scheduled dose is less than 3 days away: Skip the missed dose and resume on the regular schedule. Do not take two doses to "catch up."
Storage
Unopened, in refrigerator: 2°C to 8°C (36°F to 46°F). Good until the expiration date on the package.
Room temperature: Up to 30°C (86°F) for up to 21 days. After 21 days at room temperature, discard.
Do not freeze. Frozen tirzepatide loses potency and must be discarded.
Protect from light. Keep in original packaging when not in use.
Travel: A travel cooler with ice packs is the safest option for long trips. Hand-carry; do not check in luggage.
Managing common side effects
Nausea: Eat smaller, more frequent meals; avoid fatty or fried foods; stay hydrated
Constipation: Increase fiber, water, and physical activity; OTC fiber supplements
Diarrhea: Stay hydrated; BRAT diet (bananas, rice, applesauce, toast)
Persistent severe GI symptoms: Contact your prescribing clinician — slower titration may be needed
What requires a clinician call
Contact your prescribing clinician promptly for:
Severe persistent abdominal pain (possible pancreatitis — emergency evaluation)
Right upper quadrant pain after fatty meals (possible gallbladder issue)
Severe dehydration from prolonged vomiting or diarrhea
Severe allergic-type symptoms (rash, swelling, breathing difficulty — emergency evaluation)
Inability to keep down food or liquids for more than 24 hours
To compare how programs handle follow-up questions and dose changes, see our telehealth program reviews. NexLife, our #1 pick, lists provider review and medical guidance from NexLife Medical Group, a 1:1 call with a certified wellness coach and 24/7 support among its inclusions (nexlife.us, read October 15, 2026).
Frequently Asked Questions
What's the standard tirzepatide titration schedule?
Weeks 1-4: 2.5 mg weekly (initiation dose). Weeks 5-8: 5 mg. Weeks 9-12: 7.5 mg (optional). Weeks 13-16: 10 mg. Weeks 17-20: 12.5 mg (optional). Week 21+: 15 mg (maximum). Slower titration may be appropriate when GI tolerability is limiting.
What if I miss a tirzepatide dose?
If the next scheduled dose is more than 3 days (72 hours) away, take the missed dose as soon as you remember, then resume your regular weekly schedule. If less than 3 days remain before the next dose, skip the missed dose and continue on schedule. Never take two doses to 'catch up.'
Where should I inject tirzepatide?
FDA-approved subcutaneous injection sites are the abdomen (at least 2 inches from the navel), upper thigh (front or outer aspect), and upper arm (back). Rotate sites with each injection to prevent lipohypertrophy and skin irritation.
How should I store tirzepatide?
Unopened: refrigerate at 2-8°C (36-46°F). In-use or temporarily out of refrigeration: room temperature up to 30°C (86°F) for up to 21 days, then discard. Do not freeze. Protect from light. For travel, use a cooler with ice packs and hand-carry; never check in luggage.
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