it will cause no harm to u if taken for a short span. Though long term use is also not hepatotoxic but since its metabolism takes place in liver i won't advice it in advanced liver diseases. But healthy hep b individuals can take it without a single concern, its a good drug and enlisted in WHO's essential drug list.
I have diagnosed GERD, hiatal hernia, gastritis and reflux that aspirates into my lungs. I take either Zantac or Omeprazole, depending on how I feel. My liver doctor says that many hepatic patients take them and with my diagnosis I need to stay on medication. I worry because I do not want extra stress on my liver, but also know that I have another health issue that needs medication. Believe me, I have tried every and all non reflux medication options and they do not work for me. Most can take for a 14 day period and get off. If you can't, you need to be elevated by a GI doctor and have a upper GI done to diagnose if you have a bigger issue.