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Lomotil

Lomotil Side Effects

Hope Chang, PharmD, AAHIVPAllison Gourley, PharmD
Reviewed by Hope Chang, PharmD, AAHIVP, Allison Gourley, PharmD
Last reviewed on September 26, 2024

The following side effects may get better over time as your body gets used to the medication. Let your healthcare provider know immediately if you continue to experience these symptoms or if they worsen over time.

Common Side Effects

  • Sleepiness
  • Dizziness
  • Nausea
  • Vomiting
  • Headache
  • Loss of appetite

Less Common Side Effects

  • Restlessness
  • Dry skin
  • Confusion

Lomotil serious side effects

Contact your healthcare provider immediately if you experience any of the following.

  • Slow breathing
  • Overdose: Coma, not responsive to sound or touch, extreme fatigue, slurred speech, fast heartbeat, nausea, bloating, confusion
When do Lomotil possible side effects begin and end?
Time passed since treatment started:
H
D
W
M
Sleepiness
Dizziness
Nausea or vomiting
Headache
If a line continues to the right, you'll likely keep experiencing this side effect once it starts.

Source: DailyMed

The following Lomotil side effects have also been reported

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur:

Incidence not known

Bloating

confusion

constipation

cough

decrease in the frequency of urination

decrease in urine volume

diarrhea

difficulty in passing urine (dribbling)

difficulty swallowing

discouragement

dizziness

drowsiness

dry skin and mouth

extremely high fever or body temperature

false or unusual sense of well-being

fast, shallow breathing

fast, weak heartbeat

feeling of warmth

feeling sad or empty

headache

hives, itching, skin rash

irritability

loss of appetite

loss of interest or pleasure

muscle cramps

nausea

numbness of the arms and legs

painful urination

pale, clammy skin

puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue

redness of the face, neck, arms and occasionally, upper chest

restlessness

seeing, hearing, or feeling things that are not there

stomach cramps or pain

thirst

tightness in the chest

trouble concentrating

trouble sleeping

unusual drowsiness, dullness, tiredness, weakness, or feeling of sluggishness

unusual tiredness or weakness

vomiting

weight loss

Get emergency help immediately if any of the following symptoms of overdose occur:

Symptoms of overdose

Agitation

back pain

bigger, dilated, or enlarged pupils (black part of eye)

blurred vision

difficult or troubled breathing

feeling of warmth

fever

garbled speech

increased sensitivity of the eyes to light

irregular, fast or slow, or shallow breathing

loss of consciousness

mood or mental changes

pale or blue lips, fingernails, or skin

seizures

speech that is not understood

stiff neck

unusual tiredness or weakness

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.

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Why trust our experts?

Hope Chang is a freelance writer and content reviewer for GoodRx. She attended Howard University College of Pharmacy in Washington, D.C. and completed post-graduate residency training at the University of California, Davis Medical Center.
Allison Gourley, PharmD, is a kidney and pancreas transplant pharmacist at a teaching hospital in the San Francisco Bay Area. When she’s not educating patients about their immunosuppressants, she's actively involved in transplant research.

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