One-Page Reference
The Watch List
Symptoms to know on retatrutide, or any GLP-1 class peptide, sorted by how urgent they actually are. Print it, keep it, hand it to a friend who's starting.
Not medical advice. This is a reference for recognizing symptoms, not a diagnosis tool. Just like any medication, protocol, or peptide, consult your provider before starting, and use this list to know when a symptom is worth a call versus worth watching.
Get Help Now
Stop and act
Call your provider immediately, or go to urgent care / ER. Don't wait this one out.
- Severe, persistent abdominal pain, especially upper abdomen radiating to the back, worse after eating, not relieved by anything over the counter, with or without nausea, vomiting, or fever. Possible pancreatitis.
- Signs of a severe allergic reaction: swelling of face, lips, tongue, or throat, trouble breathing, widespread hives.
- Chest pain, fainting, or a racing heartbeat that won't settle down.
- Severe weakness, muscle cramping, or confusion alongside vomiting or diarrhea. Can signal a dangerous electrolyte imbalance.
- Any thought of self-harm.
Call Soon
Same day if you can
Not an emergency, but worth a real phone call, not a wait-and-see.
- Vomiting or diarrhea bad enough that you can't keep fluids down for 24 hours or more.
- Pain or tenderness in the upper right abdomen, or yellowing of the skin or eyes. Possible gallbladder involvement.
- A resting heart rate that's noticeably and consistently higher than your normal.
- Signs of dehydration: dizziness, dark urine, going much less often than usual.
- New or worsening anxiety, sleep trouble, or mood changes that don't feel like your normal pattern.
- Nausea that hasn't improved after several weeks on a stable dose.
Just Track It
Normal enough to note
Common, usually temporary. Mention it at your next visit, no need to call today.
- Mild nausea, especially the first few weeks or right after a dose increase.
- Mild constipation or loose stools.
- Injection site redness or irritation.
- Mild fatigue in the first month.
Before you even start: if you or a close family member has a history of medullary thyroid cancer or Multiple Endocrine Neoplasia type 2, tell your provider before starting anything in this drug class. It's a standard flag across GLP-1 peptides generally, not specific to any one of them.
