GLP-1 Checklist For New Patients: What To Do Before, During, And After Starting

March 5, 2026

Starting a GLP-1 (like semaglutide or tirzepatide) can feel strangely simple, one prescription, one injection, and then your body has opinions. This checklist keeps us focused on what actually matters before the first dose, through titration, and into the first 12 weeks so we get results and minimize side effects.

Confirm You’re A Good Candidate And Set Realistic Goals

GLP-1 medications can be game-changing, but they're not a "take it and forget it" tool. Before we start, we want two things: (1) safety (no overlooked red flags), and (2) a realistic target so we don't panic when week-to-week changes look messy.

Many prescribing guidelines center around BMI criteria and health risk: commonly BMI ≥40, or BMI ≥35 with comorbidities (like hypertension, type 2 diabetes, sleep apnea, or dyslipidemia). And for expectations: a practical early benchmark is ~3–5% body-weight loss over ~3 months after titration, especially when we pair meds with nutrition and activity changes.

Medical History And Contraindications To Review

Before we say yes to a GLP-1, we review a short but important history list with our clinician:

Pancreatitis history (or unexplained recurrent severe abdominal pain)
Gallbladder disease history (gallstones, biliary colic) and our personal risk factors
Personal or family history of medullary thyroid cancer or MEN2 (a key contraindication for several GLP-1s)
Pregnancy/breastfeeding status and future pregnancy plans (timing matters)
Mood changes: depression, anxiety, any history of suicidal ideation (worth explicitly discussing)
Kidney disease risk (especially if we've had dehydration episodes before)

We also clarify whether we're diabetic or not, because monitoring and medication coordination is different. If we're not living with diabetes, our clinician may confirm baseline glucose control (often A1C ≤6.5% depending on context) and make sure there's a plan to monitor any unexpected blood sugar changes.

Baseline Measurements To Record Before Your First Dose

It's tempting to track only weight. We get better data (and less frustration) when we capture a baseline "snapshot" the week before starting:

Weight (same scale, similar time of day)
Waist circumference (at the navel, relaxed)
Blood pressure and resting heart rate (especially if we're on BP meds)
Current GI baseline: how often we have bowel movements, typical reflux/bloating, trigger foods
Activity baseline: steps/day or workouts/week (just honest numbers)
Sleep: average hours and quality (because GLP-1s + poor sleep can be a hunger rollercoaster)

Ask our clinician which labs they want on file. Common baseline labs include A1C/fasting glucose, lipids, liver enzymes, kidney function, and a pregnancy test when relevant.

Set Goals Beyond The Scale (Appetite, Energy, Labs, Waist)

The scale can lag. It can also bounce because of constipation, sodium intake, hormonal shifts, or a hard workout. So we set goals we can actually feel and measure:

Appetite and cravings: "I stop at satisfied," "I don't snack at night," "I'm not obsessing about food"
Energy and focus: fewer afternoon crashes, better workout recovery
Waist measurement: a useful fat-loss marker even when weight stalls
Lab improvements: A1C, triglycerides, LDL/HDL patterns, liver markers
GI comfort: fewer reflux nights, less bloating, more consistent stools

When we define success as more than weight, we stick with the plan long enough to let titration work.

Prep Your Prescription Plan And Dosing Schedule

GLP-1 success often comes down to boring logistics. If we plan dosing, refills, and "what if I feel awful" scenarios ahead of time, we avoid the spiral of missed doses, rushed dose jumps, and unnecessary side effects.

Understand Titration, Missed Doses, And When To Pause

Most GLP-1s start low and increase gradually, often every ~4 weeks, so our gut and nervous system can adapt. The biggest rule: we don't self-jump doses to "catch up" or speed results. Faster isn't better if it makes us too nauseated to eat protein or drink water.

A practical checklist to clarify with our prescriber:

What's our exact titration schedule?
What counts as "tolerating the dose" (minimal nausea? normal eating? stable hydration?)
What do we do with missed doses?
When should we pause (severe GI symptoms, dehydration, illness)?
Do we need to hold the medication before surgery/procedures? (Many clinicians recommend holding around 7 days prior for weekly injections, depending on procedure and risk, confirm our plan.)

If side effects are persistent, we can often do better by staying at a lower dose longer rather than "powering through."

Coordinate With Other Medications (Diabetes, Thyroid, Blood Pressure)

This is where we absolutely want clinician oversight.

Diabetes meds (especially insulin or sulfonylureas): GLP-1s can lower glucose and increase hypoglycemia risk when combined with certain agents. We need a plan for monitoring and dose adjustments.
Blood pressure meds: Weight loss, lower appetite, and dehydration can shift blood pressure. If we're getting dizzy when standing, that's not "normal", it's a data point.
Thyroid meds: Slower gastric emptying can change how we absorb oral meds. We keep dosing consistent and recheck labs if symptoms shift.
Oral contraceptives: Some GLP-1s can reduce absorption during initiation/dose increases. Many clinicians advise a backup method for 4 weeks after starting and 4 weeks after each dose increase, we confirm what applies to our specific medication.

Plan For Travel, Refills, And Prior Authorizations

The most annoying reason people stop GLP-1s? They can't get them on time.

We plan:

Refill timing: request early enough to absorb pharmacy delays
Prior authorizations: know what documentation is needed (BMI, comorbidities, prior attempts)
Supply chain realities: if our pharmacy is unreliable, we identify a backup
Travel storage: confirm temperature requirements and pack accordingly (cool packs, hotel fridge plan)
Injection day strategy: pick a day when we can keep meals simple the next 24–48 hours

If we're prone to sensitive digestion (IBS, reflux), it's also smart to set up gut-friendly supports ahead of time, this is where brands like Casa de Sante focus, with physician-formulated digestive tools, low FODMAP resources, and GLP-1-friendly meal planning.

Build Your Nutrition And Hydration Starter Plan

A GLP-1 doesn't "replace" nutrition. It changes the rules: portions shrink, hunger cues shift, and dehydration can sneak up. Our starter plan should be simple enough to follow when appetite is low.

Protein And Fiber Targets That Reduce Side Effects

When people struggle early, it's often because they're eating too little protein and too little fiber… or they swing the other way and eat something heavy and greasy that their slowed digestion can't handle.

A practical starting framework:

Protein: aim for a protein-forward pattern at each meal (even if it's small). Think Greek yogurt, eggs, cottage cheese, tofu, chicken, fish, or a GI-friendly protein powder if solid food is unappealing.
Fiber: increase gradually. Oats, chia, kiwi, cooked vegetables, and low-FODMAP fiber options can help without turning our gut into a science experiment.

If we already have IBS or a sensitive stomach, we can do this more strategically with a low FODMAP diet approach, not forever, but as a temporary "calm the gut" lane while we titrate.

Hydration And Electrolytes: A Simple Daily Checklist

GLP-1s can blunt thirst along with appetite. Dehydration is one of the fastest paths to headaches, constipation, dizziness, and "I feel awful" weeks.

Our simple checklist:

Water goal: many people do well around 64 oz/day as a baseline (adjust for body size, sweating, climate, and clinician guidance)
Electrolytes: consider adding an electrolyte serving on days we're nauseated, sweating, traveling, or eating very little
Caffeine check: if coffee worsens reflux or nausea, we reduce or switch to half-caf
Urine color: pale yellow is a decent quick indicator (not perfect, but useful)

If we're using electrolyte powders, we choose options that don't upset our stomach, sweeteners and sugar alcohols can be a problem for some IBS folks.

GI-Friendly Food Choices (Including Low-FODMAP Options If Needed)

Early on, we want foods that are easy to digest and not overly fatty.

Go-to options many patients tolerate well:

Soups (brothy chicken/rice, miso, vegetable soups with soft textures)
Rice, potatoes, oats, sourdough toast
Bananas, berries, kiwi, applesauce
Lean proteins and simple marinades
Low-fat dairy if tolerated (or lactose-free)

If bloating or diarrhea flares, we can trial low-FODMAP swaps:

Onion/garlic → infused oils or green onion tops
Wheat-heavy meals → rice, oats, sourdough (tolerance varies)
Regular milk → lactose-free milk

Casa de Sante's low-FODMAP tools and meal plans can be helpful here if we want a structured approach that's designed for sensitive guts and GLP-1 users.

Side-Effect Prevention Toolkit (Nausea, Constipation, Diarrhea, Reflux)

Side effects aren't a personal failure. They're often a predictable mismatch between slower stomach emptying and what (or how) we're eating and drinking. We can reduce a lot of misery with a few "default settings."

What To Eat, Drink, And Avoid In The First 72 Hours After A Dose

For many of us, the first 1–3 days after an injection are when nausea or reflux is most likely. Our plan:

Eat:

Small, protein-containing meals (think: yogurt + berries, eggs + toast, chicken + rice)
Soft, lower-fat foods (soups, oatmeal, smoothies if tolerated)

Drink:

Water in small, frequent sips
Ginger tea or ginger chews (often helpful for nausea)
Electrolytes if intake is low

Avoid (especially early):

Greasy/fried foods (they can sit in the stomach and trigger nausea)
Huge salads or very high-roughage meals if we're already constipated
Carbonated drinks if burping/reflux is an issue
Alcohol (dehydration + nausea risk)

A small but surprisingly effective habit: stay upright after meals and avoid lying down right after eating.

Constipation Plan: Fiber Type, Magnesium, And When To Use Osmotics

Constipation is common with GLP-1s, and it tends to snowball, hard stools make us eat less, which makes stools harder.

We build a stepwise plan:

Hydration first: constipation + dehydration is a lock.
Fiber choice matters:

Gentle soluble fibers (like psyllium in small doses) can help, but we start low and increase slowly.
If we're IBS-prone, we may do better with low-FODMAP fiber approaches.

Magnesium: many people use magnesium glycinate or citrate: citrate is more "bowel active." We confirm what's appropriate for us, especially if kidney function is a concern.
Osmotic laxatives (when needed): options like polyethylene glycol can help if we're truly backed up. We don't wait a full week of misery, early intervention prevents worse symptoms.

If constipation is severe, painful, or paired with vomiting or inability to pass gas, we contact our clinician.

Reflux And Burping Plan: Meal Timing, Portions, And Trigger Foods

Reflux on a GLP-1 often comes from food sitting longer in the stomach. The fix is usually behavioral, not heroic.

Our reflux checklist:

Smaller portions, more often if needed
Finish eating 2–3 hours before bed
Reduce common triggers: high-fat meals, chocolate, peppermint, spicy foods, acidic sauces, carbonated drinks
Don't chase meals with huge volumes of water: instead sip fluids between meals

If reflux is new, severe, or persistent (or we're relying on OTC meds daily), we loop in our clinician to rule out complications and adjust the plan.

Safety Checklist: Red Flags And When To Contact Your Clinician

We can expect some appetite changes and mild GI shifts. But there are symptoms that are not "normal GLP-1 stuff" and deserve urgent attention.

Symptoms That Need Urgent Evaluation

We seek urgent evaluation (or emergency care, depending on severity) for:

Severe, persistent abdominal pain (especially upper abdomen, possibly radiating to the back) with or without vomiting, pancreatitis must be ruled out
Signs of gallbladder trouble: right upper abdominal pain, fever, jaundice, pain after fatty meals
Dehydration we can't correct: dizziness, fainting, very dark urine, inability to keep fluids down
Severe allergic reaction: swelling, hives, trouble breathing
Worsening depression or suicidal thoughts

If something feels "off" in a way that's escalating, we don't crowdsource it. We call.

Prevent Dehydration, Gallbladder Issues, And Severe GI Slowdown

We can reduce risk with a few preventive habits:

Don't let intake crash for days: when appetite is low, we prioritize protein + fluids in smaller amounts.
Avoid rapid, extreme restriction: very low calories and very fast weight loss can increase gallstone risk.
Monitor bowel patterns: if bowel movements stop for multiple days with discomfort, we intervene early.
Keep follow-ups: dose changes are when many issues begin.

If we have a history of gallstones, pancreatitis, or kidney disease, we make that part of the upfront decision and monitoring plan, not an afterthought.

If You’re Perimenopausal Or Menopausal: Special Considerations

For many women 35–55, GLP-1 therapy overlaps with perimenopause or menopause, aka the season where sleep, stress tolerance, body composition, and appetite cues can all shift at once. We can still do incredibly well, but we plan a bit differently.

Hormones, Appetite Changes, And Body Composition Expectations

Hormonal changes can influence:

Where we store fat (often more central)
Sleep quality (hot flashes, early waking)
Appetite and cravings (especially when stress is high)

So we set expectations around body composition: the goal isn't just "less weight," it's more fat loss with lean mass preserved. We also treat sleep like a metabolic lever, not a wellness accessory.

Strength Training And Protein To Protect Lean Mass

If we do one thing right while on a GLP-1, let it be this: protect muscle.

Our non-negotiables:

Strength training 2–4x/week (even short sessions count)
Protein at each meal, especially breakfast
A sane deficit, because losing too fast can increase fatigue, hair shedding, and muscle loss

If nausea makes protein hard, we lean on easier options: smoothies, yogurt bowls, soups with added protein, or a gentle protein powder that doesn't aggravate GI symptoms.

Coordinate GLP-1s With Hormone Therapy And Supplements

If we're on hormone therapy (or considering it), we coordinate care, full stop. We also review supplements because "natural" doesn't mean neutral.

Checklist items to discuss:

Timing and absorption of oral medications with slowed gastric emptying
Iron, B12, vitamin D, magnesium, what we actually need vs. what we're guessing
Any supplement that worsens reflux or diarrhea (common culprits: certain forms of magnesium, high-dose vitamin C, sugar alcohols)

If we're navigating IBS-like symptoms alongside hormones and GLP-1s, a structured approach (like Casa de Sante's gut-focused meal plans and digestive health tools) can remove a lot of trial-and-error.

Monitoring And Follow-Up: Your First 12 Weeks

The first 12 weeks are where we learn our pattern: which dose feels smooth, which foods trigger nausea, whether constipation is creeping in, and what the scale is doing on average (not day to day). We monitor like a scientist, not a critic.

Weekly Check-Ins: Weight Trend, Symptoms, Bowel Habits, And Sleep

Once per week (same day/time), we log:

Weight trend (we care about the trendline)
Waist (every 2–4 weeks is enough)
Appetite level and cravings
Side effects (nausea, reflux, diarrhea, constipation)
Bowel habits: frequency, consistency, straining
Sleep: hours and quality
Protein and water consistency (not perfection, consistency)

A simple note like "dose day was fine, day 2 nausea after greasy meal" can save us months of guessing.

Labs And Metrics To Recheck (A1C, Lipids, Liver, Kidney, Nutrients)

Your clinician will individualize this, but many people recheck key labs every 3–6 months, especially if they have diabetes, fatty liver risk, or are adjusting multiple medications.

Common follow-up labs/metrics include:

A1C and/or fasting glucose
Lipids (triglycerides often improve early)
Liver enzymes
Kidney function (especially if dehydration has occurred)
Nutrients when intake is low or fatigue/hair changes appear (e.g., iron studies, B12, vitamin D)

When It's Time To Adjust Dose, Nutrition, Or Activity

We adjust based on patterns, not impatience.

We consider an adjustment when:

Side effects persist beyond the early window and interfere with hydration/protein
Constipation or reflux becomes chronic
We're losing weight rapidly and feeling weak (we may need more food/protein, not more dose)
Weight loss stalls after titration and our habits are consistent (then we review dose, protein, steps/strength training, sleep, and stress)

Sometimes the best move is staying at a dose longer, tightening hydration/protein, and building strength training, not escalating automatically.

Conclusion

A GLP-1 checklist for new patients isn't about being "perfect." It's about being prepared: knowing our baseline, planning dosing and refills, protecting hydration and protein, and treating side effects early, before they snowball.

If we want the smoothest start, we pick three priorities for the first month: (1) hit protein in small meals, (2) stay ahead of hydration/constipation, and (3) track a simple weekly trend. The rest, dose optimization, body recomposition, better labs, gets a lot easier from there.

GLP-1 Checklist for New Patients: FAQs

What is a GLP-1 checklist for new patients, and what should it include?

A GLP-1 checklist for new patients covers the essentials before your first dose and through the first 12 weeks: confirm candidacy and goals, review contraindications (pancreatitis, gallbladder disease, thyroid cancer/MEN2, pregnancy), record baseline measurements, plan titration/refills, and set nutrition, hydration, and side-effect strategies.

Am I a good candidate for GLP-1 medication like semaglutide or tirzepatide?

Many guidelines use BMI thresholds: BMI ≥40, or BMI ≥35 with comorbidities like hypertension, type 2 diabetes, sleep apnea, or dyslipidemia. You’ll also review key safety history (pancreatitis, gallbladder issues, thyroid cancer/MEN2, pregnancy plans, mood changes) with your clinician before starting.

What baseline measurements and labs should I get before my first GLP-1 dose?

Track a “before” snapshot: weight (same scale/time), waist at the navel, blood pressure and resting heart rate, GI baseline (reflux/bloating/bowel habits), activity, and sleep. Common baseline labs include A1C/fasting glucose, lipids, liver enzymes, kidney function, and a pregnancy test when relevant.

How does GLP-1 titration work, and what should I do about missed doses or procedures?

Most GLP-1s start low and increase about every 4 weeks to reduce side effects—don’t self-jump doses to “catch up.” Ask your prescriber what “tolerating a dose” means, what to do if you miss an injection, and when to pause. Many clinicians advise holding weekly injections ~7 days before surgery, depending on risk.

What should I eat and drink in the first 72 hours after a GLP-1 injection to reduce nausea and reflux?

Stick to small, protein-containing, lower-fat meals (yogurt + fruit, eggs + toast, chicken + rice, soups). Sip water frequently and consider ginger tea/chews; electrolytes can help if intake is low. Avoid greasy/fried foods, alcohol, carbonation, and lying down right after eating—staying upright often reduces reflux.

Do GLP-1 medications interact with other medicines like insulin, thyroid meds, or birth control?

They can. When combined with insulin or sulfonylureas, GLP-1s may raise hypoglycemia risk, so monitoring and dose adjustments matter. Slower gastric emptying can affect absorption of oral medications (including thyroid meds). Some GLP-1s may reduce oral contraceptive absorption during start/dose increases—many clinicians recommend backup contraception for 4 weeks after each change.