Prospects that the drug might have some effect brightened last year when researchers reported that four patients who had received the maximum dose had gone three years without any decline in several measures of cognition and daily functioning, which they termed highly unusual.
The maximum tolerated dose has yet to be established and dose escalation continues to establish the dose range that yields optimal results.
Minimal toxicity of doses up to 8,000 mg have been described in humans [ 7, 8] and to date, no maximum tolerated dose has been defined.
Panitumumab is well tolerated, with the main toxicity being skin reactions, although grade 4 severity has not been observed; no maximum tolerated dose has been reported.
Thus, to our knowledge, no maximum tolerated dose has been identified in humans, although successful administration may be affected by differences in drug formulation.
If a second voiding diary indicates nocturnal urinary production is not reduced, consider a dose increase (if maximum recommended dose has not been reached); otherwise, refer the child to a specialist.
The adoption of standard-dose-for-all approach from drug labels and trial-and-error approach to titrate the patient to maximum tolerated dose has resulted in severe toxicity in some patients and insufficient treatment in others.
While all of these are Phase I studies that will enroll a variety of solid-tumor patients, at least some of the sites plan to focus on breast cancer patients, particularly once the maximum tolerated dose has been identified.
It is well tolerated and, as a consequence, a maximum-tolerated dose has not been identified (Di Salle et al, 1994; Johannessen et al, 1997).
The reasons for considering PPI therapy to be optimized were recorded by physicians (multiple response possible); the 'maximum dose' had been reached in 86% of patients, 46% of patients had tried a different brand with no improvement, improvement by changing PPI was considered unlikely due to symptom pattern in 29% and PPI therapy was considered optimized due to other reasons in 9% of patients.
