I take nexium 40 mg otc twice daily. it works pretty well, but for 3 months i wake from sleep choking with the taste of acid vomit coming from my nose and mouth onto my pillow, and also i've inhaled the vomit and my lungs burn. is this dangerous?

If you are waking up and “choking”, this reflex keeps most of the material out of your lungs and inhaling a small amount is not harmful. But, the more important question is why is this happening to you? Is it from reflux? Are you sleeping with the head of the bed raised so that your head is more upright? You should see your GI doctor if this continues to find out what the treatment should be.