WASHINGTON (AP) — A year after a meningitis outbreak from contaminated pain injections killed at least 64 people and sickened hundreds, Congress is ready to increase federal oversight over compounding pharmacies that custom-mix medications.

Before the bill gets to President Barack Obama for his signature, it first has to clear a hurdle put in its path by Louisiana Sen. David Vitter in his ongoing campaign to discredit the president's health care overhaul. A test vote is scheduled for Tuesday evening.

The legislation, passed by the House in September, also creates a national system for tracking prescription drugs from manufacturers to retail pharmacies, first through serial numbers on bottles and containers and later through electronic codes.