Serious side effects from H2 blockers are rare. Like PPIs, they can sometimes cause low B12 levels. Headaches and agitation are sometimes reported. One H2 blocker, ranitidine, has had manufacturing ...

I am a 74-year-old woman who was diagnosed with open angle glaucoma several years ago. My ophthalmologist has directed me to use Simbrinza three times a day ...

The patient information guide from Simbrinza says to use it no more than twice a day. I talked to my doctor about this last ...