Drug
Ranitidine
Pronounced
"ran-IT-uh-deen"
Side Effects
Headache, constipation or diarrhea may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly.
Tell your doctor right away if you have any serious side effects, including: vomiting, severe stomach pain, dark urine, yellowing eyes/skin.
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
In the US -
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
Precautions
Before taking ranitidine, tell your doctor or pharmacist if you are allergic to it; or to other H2 blockers (such as cimetidine, famotidine); or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: a certain blood disorder (porphyria), kidney problems, liver problems, other stomach problems (such as tumors).
Some symptoms may actually be signs of a more serious condition. Get medical help right away if you have: heartburn with lightheadedness/sweating/dizziness, chest/jaw/arm/shoulder pain (especially with shortness of breath, unusual sweating), unexplained weight loss.
In addition, before you self-treat with this medication, get medical help right away if you have any of these signs of a serious condition: trouble/pain swallowing food, bloody vomit, vomit that looks like coffee grounds, bloody/black stools, heartburn for over 3 months, frequent chest pain, frequent wheezing (especially with heartburn), nausea/vomiting, stomach pain.
Do not use this medication in children younger than 12 unless directed by the doctor.
Older adults may be more sensitive to the side effects of this drug, especially confusion.
During pregnancy, this medication should only be used if clearly needed. Discuss the risks and benefits with your doctor. Tell your doctor if you are pregnant before using this medication.
Ranitidine passes into breast milk. Consult your doctor before breastfeeding.