GLP-1 for Beginners: What to Expect in Your First 90 Days
You have your first vial of semaglutide or tirzepatide. Now what? This practical guide walks you through everything you need to know for a successful start to GLP-1 treatment.
Starting semaglutide or tirzepatide is a significant step in your health journey. Knowing what to expect takes the anxiety out of the process and sets you up for the best possible results. Here is your week-by-week guide for the first three months.
Medical Disclaimer
This guide is informational. Follow your provider's specific dosing and monitoring instructions, which may differ from general guidelines.
Month 1: Foundation
Weeks 1-4
Week 1
First injection at lowest dose. Practice your injection technique. You may notice slight appetite changes and mild nausea. Hydrate well and eat smaller meals. Expected weight change: 0-2 lbs.
Week 2
Second injection same dose. Appetite reduction becomes more noticeable. Start prioritizing protein at every meal. Side effects often improve. You may begin to notice food noise decreasing.
Week 3-4
Continue at starting dose or increase per provider guidance. Weight loss typically begins in earnest. Food portions naturally decrease. Establish your eating patterns and hydration routine.
Month 2: Acceleration
By month two, you have adjusted to the medication and likely received your first dose increase. Appetite suppression is stronger and more consistent. Weight loss accelerates, typically 1 to 2 pounds per week. You are developing new eating habits naturally rather than through restriction. Side effects from the initial dose have usually resolved, though new dose increases may temporarily cause mild nausea.
This is the time to establish your exercise routine if you have not already. Start with resistance training 2 to 3 times per week and daily walking. Focus on protein intake of 0.7 to 1 gram per pound of body weight to preserve muscle as you lose fat.
Month 3: Momentum
By month three, you are in the groove. Weight loss is consistent and visible. Clothing fits differently. Energy levels have improved. The initial side effects are behind you. And the psychological benefits are emerging: reduced food noise, improved self-image, and increasing confidence.
Typical three-month weight loss ranges from 10 to 20 pounds depending on starting weight, medication, and adherence. Your provider may increase your dose further during this period. Continue building sustainable habits that will support long-term maintenance.
Injection Tips for Beginners
Making Injections Easy
- Choose your day: Pick the same day each week and set a reminder
- Rotate sites: Alternate between abdomen, thighs, and upper arms
- Room temperature: Let medication sit out for 15-30 minutes before injecting to reduce stinging
- Pinch and inject: Gently pinch skin, insert needle at 90 degrees, inject slowly
- After injection: Do not rub the site. Apply gentle pressure with a cotton ball if needed
- Timing: Some patients prefer evening injections so any nausea occurs during sleep
Nutrition Basics
The Beginner Nutrition Checklist
- Protein first at every meal (30+ grams)
- Drink 64+ ounces of water daily (more with exercise)
- Eat slowly and stop when satisfied, not full
- Avoid carbonated beverages if they cause bloating
- Small, frequent meals beat large, infrequent ones
- Keep protein-rich snacks accessible (jerky, cheese, yogurt)
- Take a daily multivitamin to cover nutritional gaps from reduced intake
When to Contact Your Provider
Reach out to your Trimi provider if you experience severe or persistent nausea that does not improve with smaller meals, sharp abdominal pain (potential pancreatitis sign), inability to keep any food or water down for 24 hours, signs of dehydration (dark urine, dizziness, rapid heartbeat), new or worsening depression or anxiety, or if you have questions about your dosing schedule.
The Bottom Line
Your first 90 days on GLP-1 medication set the foundation for long-term success. Start slow, prioritize protein and hydration, begin exercising, and lean on your provider for guidance. The transformation ahead is real, and it starts with the first injection.
Start Your First 90 Days with Trimi
Semaglutide $99/mo, tirzepatide $125/mo. Provider support included.
Get StartedMore on getting started
Sources & References
- Wilding JPH et al. Once-Weekly Semaglutide in Adults with Overweight or Obesity. NEJM 2021;384:989-1002.
- Jastreboff AM et al. Tirzepatide Once Weekly for the Treatment of Obesity. NEJM 2022;387:205-216.
- Lincoff AM et al. Semaglutide and Cardiovascular Outcomes in Obesity without Diabetes. NEJM 2023;389:2221-2232.
- FDA Prescribing Information for Wegovy (semaglutide) and Zepbound (tirzepatide).