Your First Week on a GLP-1: A Nurse’s Honest Starter Checklist
This post is for health education purposes only and is not medical advice. Always consult your healthcare provider about your personal situation.
If you’re reading this with a new GLP-1 prescription in your hand, first — congratulations on doing the hard part. The decision to start is the part most people sit with for years. The week ahead is the part most prescribers don’t have time to walk you through. So let me.
Week one is not about heroic effort. It is about quietly setting up systems that will carry you through the parts that are harder. The patients who do this well have dramatically smoother first months. The patients who skip it learn the same lessons the slower way. Here is the checklist I give every new starter.
Day 0 — The Day Before You Inject
• Stock the fridge with safe foods. Greek yogurt, cottage cheese, eggs, deli turkey or rotisserie chicken, broths, frozen berries, bananas, crackers, plain rice, oats, peanut butter, ginger tea. These are the foods most people tolerate even at the worst of side effects. Stock them now while you still have appetite.
• Pre-prep two protein sources. Hard-boil six eggs. Cook a batch of chicken or turkey for the week. The single biggest reason new patients undereat protein is that nothing is ready when they need it. Solve that on day zero.
• Buy a water bottle and electrolytes. A 32-ounce water bottle you actually like, plus a sugar-free electrolyte option (LMNT, Liquid IV, Nuun — any of them). You will be thirstier than you feel. The signal is dulled by the medication.
Day 1 — Injection Day
• Pick a consistent injection day and time. Most people do best with a Sunday evening or Monday morning. Pick something you’ll remember. Set a recurring calendar reminder. The first dose is the smallest you’ll ever take — most side effects are mild or absent in the first week.
• Take a baseline photo and weight. Front, side, and back, in consistent lighting and clothing. You will not appreciate this in two weeks. You will be enormously glad in three months.
• Open a notes file. On your phone. Date it. Write down what you ate, how you felt, and any symptoms. By month two, this file is gold for your prescriber and for yourself.
Days 2–4 — Build the Eating Pattern
• Eat on a schedule, not on hunger. Hunger may not show up. Hunger is no longer your timer. Set three to five small eating times: breakfast, mid-morning, lunch, mid-afternoon, dinner. Each meal: a fist-sized portion of protein, plus a small carbohydrate or vegetable.
• Hit your fluid floor. Sixty-four ounces minimum. A quarter teaspoon of salt in your first morning glass keeps electrolytes steady from day one. This single habit prevents the headaches and the 3 p.m. drag most new patients run into.
• Walk for ten minutes after dinner. Not optional. It is the single most reliable defense against nausea, reflux, and constipation in the first month. Even slow counts.
Days 5–7 — Watch for the Common Side Effects
Most people feel mild nausea, fullness, or constipation by the end of the first week. None of it is unusual. Have these tools on hand before they’re needed: ginger chews or ginger tea for nausea, magnesium citrate or glycinate (200 to 400 mg at night) for constipation, peppermint capsules for reflux. If your prescriber wrote a prescription for ondansetron (Zofran), have it filled before day one — not after a bad night.
What is not normal: persistent vomiting that won’t stop, severe abdominal pain that radiates to the back, or signs of dehydration you can’t correct with fluids and electrolytes. Those deserve a same-day call to your provider.
What Most People Wish They Had Done Differently
• Started protein from day one. Protein is the single highest-leverage habit on a GLP-1. Aiming for 0.6 to 0.8 grams per pound of your goal body weight from week one protects muscle, energy, and hair before any of them slip.
• Bought the right water bottle. Seriously. People who like their bottle drink twice as much from it. This sounds silly until you realize how much of GLP-1 success comes down to fluid intake.
• Told one person. A partner, a friend, a sibling. Someone who can ask you on a Friday how the week was. The accountability and the social support quietly raise the success rate. You don’t have to announce it to the world — but tell one person.
Your First Step
If you only do one thing tonight, do this: write down your injection day, your fluid target, and the protein number you’re aiming for. Stick the note on the fridge. The patients who keep this visible in week one keep it visible in month six. For the foundation that turns a steady week into a steady month — the five core nutrition principles I walk every new starter through — download the free GLP-1 Nutrition Blueprint below. Subscribing also gets you the LeanPossible newsletter, where I send the tactical follow-ups for new starters: week-by-week patterns, side-effect prevention, and what my patients wish they had known on day one.
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