Generally yes. If you go to the vets try to take a urine sample just to rule out any signs of a urinary tract infection. The vet may want to take some bloods to rule out a kidney infection or something like diabetes causing the dog to produce more urine.
Any changes in drinking habits?
Once the 'nasties' are ruled out there are some products designed for use in bitches that can sometimes help male dogs (off licence).
Absolutely worth a trip to the vets - remember to take the ****..........