51.   The advent of powerful new drug therapies has given some a false sense that the crisis is over.

52.   The cactus, ranging from the size of a quarter to several inches across, contains the powerful hallucinogenic drug mescaline.

53.   The campaign could spark a violent backlash not only from farmers but from the powerful drug mafia and local commanders who have profited handsomely from the plants.

54.   The conspiracy theories swirling around both of them have included governing-party politicians and powerful drug traffickers as possible suspects.

55.   The finding provides both a warning and a promise for many AIDS patients who have seen their disease symptoms vanish after therapy with powerful new drug combinations.

56.   The goal was to enable patients to eventually do without the powerful drugs that can keep the virus in check.

57.   The most prominent example involved the off-label use of powerful drugs meant to control severe cases of arrhythmia, or irregular heartbeat.

58.   The lawyers, who represent people infected with HIV, said the program unfairly denies poor women access to a powerful drug that might save their babies.

59.   The news came as a sobering counterpoint to recent optimism that powerful new drugs have begun eliminating disease symptoms and lowering the death rate among AIDS patients.