Does Long Term Use Of Diphenhydramine Cause Dry Mouth?
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Detailed Answer:
Hello,
All of the antihistamines have the potential to cause dry mouth. You can experiment with other antihistamines to see if they cause less dryness.
You might consider cetirizine (brand name is Zyrtec). This works over 24 hours, and may be less drying. It can be somewhat sedating but may not be as sedating as diphenhydramine. If it helps with your allergies all day and night, it may take care of the problem that is keeping you awake without needing to be as sedating.
Others that you can consider are Allegra and Claritin. These are even less sedating.
If the dry mouth from the diphenhydramine doesn't bother you too much, it is reasonable to just continue with it.
I hope this information helps. Please let me know if I can provide further information.