Is there a difference between being thirsty and dehydrated? Like scientifically, biologically – by the time you notice that you are thirsty, are you already dehydrated?

Question

Is there a difference between being thirsty and dehydrated? Like scientifically, biologically – by the time you notice that you are thirsty, are you already dehydrated?

In: Biology

Answer 1

Medications that cause dry mouth – I take some of these – make people feel very thirsty because the mouth does not have enough saliva. When I have these symptoms I could drink water non-stop and still feel thirsty.