To Compare The Effects Of Two Doses Of Vandetanib In Patients With Advanced Medullary Thyroid Cancer

"Oral blinded tablets taken once daily.~At objective disease progression or 14 months (whichever is earlier), patient may be unblinded to treatment~Dosing with unblinded study treatment can continue until 24 months after patient was randomised.~At any time dosing may be interrupted for up to 6 weeks due to toxicity. Dosing may restart at a reduced dose (200mg/day). Once reduced, dose increases are not permitted and dosing must stop if further toxicities occur."

"Oral blinded tablets taken once daily.~At objective disease progression or 14 months (whichever is earlier), patient may be unblinded to treatment. Patients who have not dose reduced at the time of unblinding may have their dose increased to 300mg~Dosing with unblinded study treatment can continue until 24 months after patient was randomised~At any time dosing may be interrupted for up to 6 weeks due to toxicity. Dosing may restart at a reduced dose (100mg/day) \[OR 300 reduced to 200mg/day if dose was increased at unblinding.\] Once reduced, dose increases are not permitted and dosing must stop if further toxicities occur."