I too have a dog with MVD and has been on medication since he was nearly 10 yrs old, he has 1 5 mg Fortekor per day 1 20mg of Frusimede per day which was up until October last year on varying doses from as little as a quarter a day. He was quite poorly in October last year and Vetmedin 1.25 mg was added - he takes 2 per day and I must say his coughing has improved - he actually has been to the Vets this morning for his 3 month check and his review of medication and the Vet is quite happy that the Vetmedin has helped him, my dog is a good age - he will be 14 yrs old in March. I get my medication through my Vet and the Fortekor tablets are about £1.00 each and the Vetmedin is not as much as that - I pay about £46 for 100 tablets. I hope this is of some help to you.
and my two special boys Jasper age 13 and Ollie age 3.