Famotidine (Oral Route)

Side Effects

Drug information provided by: Merative, Micromedex®

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:

Rare

1. Anxiety
2. bleeding gums
3. blistering, peeling, or loosening of the skin
4. blood in the urine or stools
5. bloody, black, or tarry stools
6. cough
7. difficulty breathing
8. discouragement
9. fast, irregular, pounding, or racing heartbeat or pulse
10. feeling sad or empty
11. irritability
12. lack of appetite
13. loss of interest or pleasure
14. noisy breathing
15. pinpoint red spots on the skin
16. seeing, hearing, or feeling things that are not there
17. seizures
18. swelling around the eyes
19. tightness in the chest
20. trouble concentrating
21. trouble sleeping
22. unusual bleeding or bruising

Incidence not known

1. Agitation
2. blistering, peeling, or loosening of the skin
3. burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
4. chest pain
5. chills
6. clay-colored stools
7. dark urine
8. diarrhea
9. difficulty swallowing
10. dizziness or fainting
11. fever
12. general feeling of tiredness or weakness
13. headache
14. high fever
15. hives, itching, skin rash
16. hoarseness
17. joint or muscle pain
18. large, hive-like swelling on face, eyelids, lips, tongue, throat, hands, legs, feet, or genitals
19. light-colored stools
20. lower back or side pain
21. nausea
22. painful or difficult urination
23. pale skin
24. puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
25. red skin lesions, often with a purple center
26. red, irritated eyes
27. sore throat
28. sores, ulcers, or white spots in the mouth or on the lips
29. stomach pain
30. swollen glands
31. unpleasant breath odor
32. unusual tiredness or weakness
33. upper right abdominal pain
34. vomiting of blood
35. yellow eyes or skin

Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

Less common

1. Difficulty having a bowel movement

Rare

1. Bad, unusual, or unpleasant (after) taste
2. bone or muscle pain
3. change in taste
4. continuing ringing or buzzing or other unexplained noise in the ears
5. decreased interest in sexual intercourse
6. difficulty in moving
7. dry mouth
8. dry skin
9. feeling of warmth
10. hearing loss
11. inability to have or keep an erection
12. lack or loss of strength
13. loss in sexual ability, desire, drive, or performance
14. muscle pain or stiffness
15. redness of the face, neck, arms and occasionally, upper chest
16. redness of the white part of the eyes
17. stomach discomfort
18. unusual drowsiness

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.

• Precautions

Portions of this document last updated: Feb. 01, 2024

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