My suggestion/caution would be to talk to LOTS of people and do LOTS of research before you make up your mind. I was on Copaxone for about 5 years, and have been on "break" from it for almost 2 years. I'm still trying to decide whether or not to go back on it.

I'm almost 62. I honestly think if I were your age, I'd do whatever was possible to lessen the likelihood of disability. Note I say "lessen", as it's a calculated risk either way.

Again, you will meet people who are terrified of the DMD's, and those who are terrified not to take them.