Weasel Words

From the drugs own literature:
It is believed that ZYPREXA works by adjusting the imbalance of chemicals in the brain that may cause your symptoms. By doing so, ZYPREXA may help restore more normal thinking and mood.

Risperidone (Jansen's RISPERDAL®).
How does RISPERDAL work?
Symptoms of schizophrenia are thought to be caused by imbalances of chemicals in the brain. These chemicals are called dopamine and serotonin. Exactly how RISPERDAL works is unknown. However, it seems to readjust the balance of dopamine and serotonin. This may help relieve symptoms of anxiety, depression, suspiciousness and delusions.
Such suggestive, hedged wording—"it is believed," "imbalance . . . that may," "ZYPREXA may help," "are thought to be," "Exactly how RISPERDAL works is unknown." "It seems to," "this may help"—apparently does help to avoid damaging lawsuits for false claims.