Does acid reflux cause dry tongue and bitterness?

Probably yes: It will not cause a dry tongue but may a cause bitter taste. Over a period of time untreated acid reflux may dissolve the outer layer, enamel, of the teeth.

Possible: Acid reflux can cause a bad taste, sore throat. I am not sure what you mean by a dry tongue. I hope you are being treated for acid reflux. The acids can badly erode your teeth. Acid reflux can be caused by sleep apnea. So if you are tired all the time, snore, gasp for breath while sleeping, are overweight, .