PHYSICIAN-REVIEWED GUIDE

When to Call Your Doctor on GLP-1 Therapy

Q: I feel my heart racing. Is this dangerous?

Brief awareness of heartbeat is common, often from dehydration. However, persistent rapid heartbeat, palpitations, chest pain, or shortness of breath warrant a call to your doctor or urgent care.

Your safety comes first. Know the difference between normal adjustment and warning signs that need medical attention.

Starting GLP-1 therapy comes with adjustment side effects—many of which are completely normal and temporary. But not every symptom is just an adjustment. This guide helps you distinguish between expected side effects and warning signs that warrant a call to your doctor.

A simple rule: When in doubt, call. Your physician knows your medical history, other medications, and health conditions. It's always better to check in than to worry in silence.

Normal Adjustment vs. Warning Signs

Most patients experience some side effects in the first weeks. Here's what to expect and what warrants medical attention:

Symptom	Normal Adjustment	Call Your Doctor
Nausea	Mild to moderate nausea that peaks days 2-4 and improves by days 5-10; manageable with ginger, small meals, water	Persistent vomiting lasting hours; unable to keep down water; signs of dehydration
Dizziness	Mild dizziness on standing that improves with water and electrolytes; usually indicates dehydration	Severe dizziness; fainting; dizziness that doesn't improve after hydration and rest
Fatigue	Afternoon energy dips linked to reduced calorie intake; improves with protein and hydration; normal during adjustment	Severe exhaustion; inability to perform daily activities; fatigue that worsens over days despite rest
GI Discomfort	Mild bloating, constipation, or loose stools; usually improves with hydration and fiber; cramping that's manageable	Severe abdominal pain; persistent cramping; signs of pancreatitis (pain radiating to back, severe upper abdomen)
Heartbeat Changes	Awareness of heartbeat during adjustment; usually improves with hydration	Persistent rapid heartbeat; palpitations; chest pain; shortness of breath
Appetite Loss	Significant appetite suppression is the intended effect; deepens with dose escalation	Complete inability to eat anything; severe nausea preventing any food intake

Call Your Doctor If You Experience These Symptoms

Any of the following warrant a conversation with your prescribing physician:

GI and Pancreatic Warning Signs

Severe or Persistent Vomiting: Vomiting that prevents you from eating or drinking for 6+ hours, or that lasts more than a few days. This can lead to dangerous dehydration.
Severe Abdominal Pain: Sharp, stabbing, or severe pain in the abdomen that doesn't ease with rest or typical remedies.
Signs of Pancreatitis (Rare but Serious): Severe pain in the upper abdomen, pain that radiates between the shoulder blades or to the back, pain that worsens after eating fatty foods. Pancreatitis is rare on GLP-1s but requires immediate medical attention.
Persistent Severe Constipation or Diarrhea: Constipation lasting more than a few days despite hydration and fiber; or severe diarrhea that affects hydration status.

Cardiovascular Warning Signs

Chest Pain or Pressure: Any chest discomfort, especially if accompanied by shortness of breath or arm/neck pain.
Rapid or Irregular Heartbeat (Sustained): Heart rate above 100 bpm at rest lasting hours; irregular heartbeats; heart palpitations that worsen or persist.
Shortness of Breath: Difficulty breathing, especially at rest or with minimal exertion.
Severe Dizziness or Fainting: Episodes of fainting, or dizziness so severe you can't safely move or function.

Neurological and Metabolic Warning Signs

Severe Headaches: Persistent, worsening headaches, especially with neck stiffness, vision changes, or confusion.
Vision Changes: Blurred vision, double vision, loss of vision in part of visual field, or new vision problems.
Tremors or Muscle Weakness: Unexplained shaking, weakness, or difficulty with muscle control.
Confusion or Difficulty Concentrating: Mental fog that's severe or worsening, difficulty with basic tasks, confusion about time or place.
Signs of Hypoglycemia (Low Blood Sugar): If you take insulin or other diabetes medications: excessive sweating, trembling, confusion, rapid heartbeat, severe anxiety, or loss of consciousness. Eat fast-acting sugar immediately and call for help.

Thyroid and Endocrine Warning Signs

Lump in the Neck: New or enlarging lump in the front or side of the neck.
Hoarseness or Persistent Sore Throat: Vocal changes or difficulty swallowing that persists for more than a week.
Difficulty Swallowing: Persistent trouble swallowing solids or liquids.
Shortness of Breath (Thyroid-Related): Especially if accompanied by neck symptoms or voice changes.
Note: These symptoms are extremely rare on GLP-1 therapy, but more relevant if you have a personal or family history of medullary thyroid cancer or multiple endocrine neoplasia (MEN).

Kidney and Urinary Warning Signs

Severe Dehydration Symptoms: No urination for 8+ hours, extremely dark urine, severe dizziness, confusion.
Difficulty Urinating or Inability to Urinate: Inability to urinate despite needing to, or severe pain with urination.
Blood in Urine: Visible or persistent blood in urine.

Allergic Reaction Warning Signs

Rash or Hives: Widespread itching, rash, or hives, especially if appearing within hours of injection.
Swelling of Face, Lips, or Tongue: Facial swelling, difficulty breathing, wheezing.
Severe Allergic Reaction: Difficulty breathing, severe throat swelling, loss of consciousness. Call 911.

Persistent Nausea or GI Issues

Nausea Beyond 2-3 Weeks: If nausea persists longer than expected at a given dose level, discuss management options with your doctor.
Inability to Eat Adequate Nutrition: If appetite suppression is preventing you from eating enough protein and nutrients despite effort.

When Mild Symptoms Are Likely Just Adjustment

Mild nausea, slight dizziness, loose stools, or fatigue in the first week or two are typically normal. Try hydration, electrolytes, small frequent meals, ginger, and rest first. If symptoms improve within 7-10 days, you're on track. The key is watching for severity and duration.

What to Track: A Simple Symptom Log

Keeping a brief record helps you and your doctor spot patterns and make informed decisions:

Track These Daily (First 30 Days)

Nausea: Mild / Moderate / Severe / None; when it happens (time of day)
Appetite: None / Minimal / Moderate; foods that trigger nausea (if any)
Energy Level: Low / Moderate / High (rate 1-10)
Dizziness or Lightheadedness: When did it occur? Did hydration/food help?
GI Symptoms: Constipation / Diarrhea / Bloating / Cramping; severity (mild/moderate/severe)
Water Intake: Approximate liters per day
Protein Intake: Approximate grams per day
Sleep Quality: Hours slept, quality (good/fair/poor)

Bring This Log to Your Doctor Visit

Patterns are more helpful than individual symptoms. For example: "Nausea occurs 2-3 hours after eating fatty foods and resolves with water and rest" tells your doctor more than "I felt nauseous today."

Questions to Ask Your Prescribing Doctor

Come prepared with these questions at your next visit or phone call:

Before You Start

What dose will I be starting at, and what's the escalation schedule?
What side effects should I expect, and how long do they typically last?
Are there any contraindications based on my medical history?
Do I have risk factors for pancreatitis or thyroid issues I should monitor for?
Are there any medications or supplements I should avoid while taking this medication?

During Adjustment (If Experiencing Symptoms)

Is this symptom normal for my dose level and timeline?
What can I do to manage this at home? (hydration, dietary changes, supplements)
Should I take an anti-nausea medication or other supportive medication?
Do I need to pause, reduce my dose, or adjust my escalation timeline?
When should I reach out again if this doesn't improve?
Is supplementation safe for me? Any specific supplements recommended?

Ongoing Safety

What symptoms would warrant immediate medical attention or an ER visit?
How do I contact you or an urgent care line outside business hours?
How often should I have check-ins? Blood work or labs?
What's your protocol if I experience symptoms that concern me?

Frequently Asked Questions

I feel mild dizziness after my dose. Is this an emergency?

Likely not, but don't ignore it. Mild dizziness is usually dehydration or electrolyte imbalance. Try drinking 500mL of water or electrolyte solution and sitting down for 10-15 minutes. If dizziness resolves and you feel normal, you can monitor. If it worsens, persists beyond a few hours, or returns frequently, call your doctor. Severe dizziness or fainting is more urgent—call immediately.

Is some nausea normal, or should I call my doctor?

Mild to moderate nausea in the first week or two is normal. Try ginger, small frequent meals, hydration, and B6 first. If nausea is severe, prevents eating/drinking, or persists beyond 2-3 weeks at a given dose, call your doctor. They may recommend anti-nausea medication, a dose adjustment, or other support.

I haven't eaten much in 24 hours due to nausea. Should I go to the ER?

If you're able to sip water and feel stable (not fainting, not severely dehydrated), you can call your doctor for urgent guidance. If you can't keep anything down, feel severely weak, or show signs of serious dehydration (no urination, severe dizziness, confusion), go to the ER or call 911. You may need IV fluids.

Stomach pain started 3 days after my injection. Should I be worried about pancreatitis?

Pancreatitis is rare, but important to rule out. Call your doctor to describe the pain: location (upper abdomen? radiating to back?), severity (mild/moderate/severe), timing (constant or comes and goes?), and what makes it better/worse. Pancreatitis pain is typically severe, constant, and in the upper abdomen or back. Mild to moderate abdominal discomfort is more common with GLP-1 therapy, but always better to check than guess.

I feel my heart racing. Is this dangerous?

Brief awareness of your heartbeat (especially during dehydration) is common. However, persistent rapid heartbeat (100+ bpm at rest), palpitations (fluttering sensation), chest pain, or shortness of breath warrant a call to your doctor, or a visit to urgent care. They may want to check your electrolytes, blood pressure, and heart rhythm.

My side effects are getting worse, not better. What should I do?

Call your doctor immediately. Worsening symptoms may indicate: you're sensitive to this medication dose (dose reduction may help), dehydration or electrolyte issues (manageable with hydration), or a less common serious side effect (needs evaluation). Don't tough it out—your doctor has options.

I think I'm having an allergic reaction. What do I do?

If you experience hives, rash, facial swelling, or mild swelling of lips/tongue, call your doctor immediately or go to an urgent care. If you have severe swelling, difficulty breathing, or throat tightness, call 911. Severe allergic reactions are rare but require emergency care.

Can I stop taking my GLP-1 medication if side effects are too much?

Don't stop suddenly without talking to your doctor. While GLP-1 side effects are usually manageable with dose adjustment, support, or change of medication, stopping abruptly may cause issues. Your doctor can help you pause, reduce the dose, switch medications, or taper safely.

When should I go to the ER vs. calling my doctor?

Go to the ER (or call 911) if you experience: severe chest pain, fainting, severe difficulty breathing, severe allergic reaction (swelling, difficulty breathing), severe abdominal pain that could be pancreatitis, or signs of severe dehydration with altered mental state. For other concerns, call your doctor first and follow their guidance.

From the Desk of Dr. George W. Carroll, MD

"Your safety is my top priority. The side effects of GLP-1 therapy are manageable, and most patients sail through adjustment with proper support. But some symptoms warrant attention, and I want you to know the difference. The best patient is one who calls when something doesn't feel right—not the one who waits it out hoping for improvement. If you're unsure, call. That's what I'm here for."

Dr. George W. Carroll, MD — Physician Formulator, GLPrelief

Support Your Adjustment With Confidence

GLPrelief is designed to address the most common adjustment challenges: nausea (ginger), energy dips (B-vitamins), hydration and electrolyte balance, and muscle preservation (magnesium, amino acids). A daily ritual that helps you stay supported through the adjustment period.

Critical Medical Disclaimers:

* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

* This guide is educational only and does not replace professional medical advice. Always consult your prescribing physician for guidance on your specific situation.

* For medical emergencies, call 911 or go to the nearest emergency room. Do not wait for callback from your doctor.

* Always consult your healthcare provider before starting any new supplement, especially if you are taking GLP-1 receptor agonist medications or other prescription drugs.

* If you have a personal or family history of medullary thyroid cancer, multiple endocrine neoplasia (MEN), or other serious conditions, discuss with your doctor before starting GLP-1 therapy.