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For anyone thinking “is this normal?”

GLP-1 Side Effects: Am I Normal?

Nauseous in week 2? Constipated, exhausted, weirdly cold, or getting rotten-egg burps? Almost all of it is common and temporary. Check your symptom and your week below to see what's typical — and the exact signs that mean you should call a doctor.

Check my symptom Free · No sign-up · Not medical advice

The side-effect timeline

When each symptom typically starts, peaks, and fades. Drag to your week.

Side Effect Timeline

Move the slider to your week and see what's typical now — and what should be fading.

Your week on the medicationWeek 2
Nausea
Sulfur burps
Constipation
Diarrhea
Bloating & gas
Heartburn
Fatigue
Feeling cold
Headaches
Dizziness
Hair loss
Injection site
Hydration
Vomiting
Muscle / face loss
Wk 1Wk 6Wk 12Wk 18Wk 24
Usual peak Onset → fades You are here

A general pattern, not a rule — timing shifts with your drug, dose, and how fast it was raised. Bars reset somewhat after each dose increase.

Am I normal?

Tell us your symptom and how far in you are — we'll tell you if it's expected.

Week 2
Week 1Week 12Week 24+
Very commonMost common right now

Yes, this is the single most common GLP-1 side effect. Nausea is the most common GLP-1 side effect and is almost always temporary — it usually flares after a dose increase and fades within a week or two. Right now is typically when it's at its worst — for most people it improves from here.

What helps

  • Eat smaller meals, slowly, and stop at 'satisfied' rather than full
  • Avoid fried, very fatty, greasy, or spicy food while nausea is active
  • Choose cold or room-temperature foods — they smell less intense than hot food

Call your doctor if

  • Vomiting repeatedly or being unable to keep fluids down
  • Severe stomach pain, especially pain radiating to your back
  • Signs of dehydration — dizziness, very dark urine, not urinating
Read the full guide on nausea

Educational guidance based on common patterns — not a diagnosis. Everyone responds differently; when in doubt, contact your prescriber.

When it's not just a side effect

Contact your prescriber or seek urgent care if you have any of these — they are not the routine symptoms above:

  • Severe stomach pain, especially pain that radiates to your back (possible pancreatitis)
  • Persistent vomiting or an inability to keep any fluids down
  • Upper-right belly pain, fever, or yellowing skin/eyes (possible gallbladder issue)
  • Signs of dehydration — dizziness, very dark urine, or not urinating
  • A serious allergic reaction — swelling, trouble breathing, or a spreading rash
  • Shakiness, sweating, or confusion (possible low blood sugar)

Log your symptoms and spot the pattern

Tracking each side effect against your dose shows you what's improving, what flares after an increase, and gives your prescriber real data at your next visit.

Start tracking free

Frequently Asked Questions

Common questions and answers about our calculator

Tool Information

Last reviewed

July 24, 2026

Reviewed by

Dr. Jaydeep Sanghani

Created by

Meet Akabari

Dr. Jaydeep Sanghani

Dr. Jaydeep Sanghani

MBBS, MD, DNB(Anaesth.), PDCC(CCM), DrNB(CCM)

AIIMS Bhubaneswar · AIIMS Rishikesh

Critical care specialist and anesthesiologist with advanced training from AIIMS. Reviews health calculators at Calqulate to ensure medical accuracy and evidence-based standards.