There are potential Zantac dangers that you should be aware of before starting this medication. For people with acute porphyria (a condition involving a problem with certain liver enzymes), Zantac may cause porphyria attacks. People with liver or kidney problems should talk to their healthcare providers before using this drug because the liver and kidneys help remove Zantac from the body.
It is also important to look out for side effects during treatment. Some of the most common side effects that have been reported with Zantac include
diarrhea,
headaches, rash, and nausea or vomiting. While most side effects are mild, some are potentially dangerous and should be reported to your healthcare provider immediately, including swelling of the mouth or throat, fast heart rate, and upper-right abdominal pain.