mri to rule out tumor, PET scan to dx PD.

RD42, I take 4 x Stalevo 100 daily, it was my starter dose and I have stuck with this for the last two years. It works fine for me.

Apart from the obvious options discussed here, you should bear in mind that Stalevo is designed as a constant and gradual release drug, so you don't get the l-dopa rush and resultant side effects. I am a firm believer that a persons body mass and metabolic make up determine the effective absorption and hence dosage of a drug. It could be that your body mass and metabolism need a higher dosage to be effective. On the other hand your Neuro may tell you that is complete nonsense but it may be worth suggesting.

Good luck,
Neil.