Maybe someone knows or can point to scientific literature
1) Why should you take levadopa, if you have no tremor? I believe tremor is the main symptom relieved by taking levadopa.
2) Levadopa on average stops being efficient after 5-10 years. Why? This is strange as the brain should still need dopamine
3) Levadopa causes dyskinesia, on average after 5 years. Research indicates that levadopa somehow alters the brain over the years. The exact change is not exactly known.
So, combining (2) and (3) indicates that after 5 years, for many people, levadopa no more works but has in fact caused additional problems, i.e., dyskinesia. Is that really correct?