Yes - there are clinics that will prescribe deca for joints. My clinic allows 100 mg per week and recommends 20 weeks on and 20 weeks off. There are several threads addressing this already if you want more info - can probably find them with a quick search.
As mentioned above, it simply masks the underlying issues whereas HGH or other peptides can actually aid in regenerating. I can tell you firsthand that deca does offer relief and, you will see in the other strings on the subject, many run it year round and also enjoy the benefits.