Tirzepatide: What to Expect

Tirzepatide is a dual GLP-1/GIP receptor agonist used for weight loss. It's administered as a once-weekly subcutaneous injection. This guide covers how tirzepatide works, what to expect during treatment, and how it compares to GLP-1-only medications.

How Tirzepatide Works

Tirzepatide activates two hormone receptors simultaneously—GLP-1 (glucagon-like peptide-1) and GIP (glucose-dependent insulinotropic polypeptide). This dual action:

• Reduces appetite more aggressively than GLP-1-only medications

• Improves insulin sensitivity and metabolic function

• Slows gastric emptying to extend satiety

Clinical studies show tirzepatide produces greater average weight loss than semaglutide in head-to-head comparisons at higher doses.

Starting Dose and Titration

Tirzepatide starts at 2.5 mg weekly. Your provider selects your starting dose based on your health profile. Doses increase gradually every 4 weeks or more, based on how you tolerate each level and whether you need more effect.

The titration process is provider-driven—your provider adjusts your dose, not you. Contact the clinical team through your patient portal to request a dose review.

How to Inject

• Injected subcutaneously once weekly

• Injection sites: abdomen, upper thigh, or upper arm

• Rotate injection sites each week

• Can be taken any time of day, with or without food

• If you miss a dose by fewer than 4 days, take it as soon as possible; if more than 4 days have passed, skip it and resume your normal schedule

What to Expect Month by Month

Month 1: Strong Adjustment

Appetite suppression can be pronounced even at the starting dose. Nausea is common—similar to semaglutide but may be more intense for some people at higher doses. Weight loss in month one is typically modest.

Months 2–6: Significant Progress

As dose adjustments occur, most meaningful weight loss accumulates during this phase. Many patients report a marked reduction in "food noise" (constant thoughts about eating) and strong satiety even with small meals.

Common Side Effects

• Nausea — common especially with dose increases; usually improves within 1–2 weeks

• Diarrhea — more frequently reported with tirzepatide than semaglutide at some doses

• Constipation — also occurs; hydration and fiber help

• Vomiting — possible, especially if dose is increased too quickly

• Fatigue and decreased appetite — expected effects

If side effects are severe or interfering with daily life, contact your clinical team. Your provider may keep you at the current dose longer before increasing.

Storage

Refrigerate your medication. Do not freeze. If your medication arrived warm or the ice packs were melted, contact support before using it and hold the medication until you receive guidance.