You will be assigned to one of 8 specific dose levels of atiprimod, based on when you entered the study; however, your dose level may be lowered if you experience increased blood levels of AST and ALT (liver function tests used to monitor for possible liver inflammation). Your assigned dose level will decide how many tablets or capsules of atiprimod you will take for each dose. The first group of 3 patients will receive atiprimod tablets at the lowest dose level for 14 days, followed by 14 days off drug. If no serious side effects occur, the next 3 patients will receive atiprimod capsules at the lowest dose level. If no serious side effects occur, the next 3 patients will receive atiprimod capsules at the next higher dose level and capsules will be used for the rest of the study (tablets will only be used for the first group of 3 patients). If 1 of the 3 patients experiences a serious side effect, the next 3 patients will be given the same dose (rather than the next higher dose) to further evaluate safety at that dose. If no serious side effects occur, the next 3 patients will receive the next higher dose. Each new dose level will be tested in this way, until the highest dose level (8th dose level) is reached or until serious side effects occur, in which case the dose will not be raised any higher.