FIRST COPY LIST FAT BITCH: KILLING THE WILLPOWER MYTH RELEASES OCTOBER 15, 2026
UNLIT PUBLISHING • 2026
GLP-1 Side Effects

Diarrhea and Constipation

Common. Often improves as your body adjusts to the new or increased dose.

Why it happens

Diarrhea can happen as a response to medicine dosage upgrades. It can also be your body’s response to constipation.

How to prevent it

Regular fiber and water intake will help keep your digestion moving and prevent constipation and blockages.

How to treat it

For constipation, you can try magnesium supplements, fiber supplements, prunes, or stool (poop) softeners, or over-the-counter MiraLAX. For constant diarrhea, you can try something like Imodium.

When to call a doctor

If you have been using the supplements and over-the-counter stuff, but still can’t poop after 4 days.

Severe cramping that disrupts your day, or pencil-thin poops, warrant a call to your doctor to check your health and prescription provider to advise on continuing or tapering your dose.

When to go to the ER

  • Inability to swallow or breathe.
  • Severe, persistent vomiting (dehydration).
  • Severe abdominal pain that makes you curl into a ball.
  • Thoughts of self-harm or suicide.
  • If you feel like you are having a medical emergency.
Source: this entry is drawn from “Side Effects” in FAT BITCH: Killing the Willpower Myth by Cat Clark (UNLIT Publishing, October 15, 2026). The full chapter has the context this page does not. Get on The First Copy List and we send the order link the day it goes live.

None of this is medical advice. It is educational material drawn from FAT BITCH: Killing the Willpower Myth by Cat Clark, and it does not replace your prescriber, your pharmacist, or your actual doctor. If something here does not match what your care team told you, go with your care team and bring this along to the conversation.