FOXBOROUGH, Mass.  — The New England Patriots moved to shore up their shaky secondary on Thursday by obtaining cornerback Aqib Talib from the Tampa Bay Buccaneers.

The Patriots traded their fourth-round pick in next year’s draft for the former first-round choice, who is coming off his second NFL suspension, and a seventh-rounder in 2012.

Talib, who has 18 interceptions since being taken by Tampa Bay with the 20th pick in 2008 out of Kansas, will be eligible to play in the Patriots’ next game on Nov. 11 after serving a four-game suspension for violating the league’s policy on performance-enhancing substances.

He said at the time of the suspension that he took an Adderall pill without a prescription “around the beginning of training camp.” He also was suspended without pay for the regular-season opener in 2010 and fined one additional game check for violating the NFL’s personal-conduct policy. That penalty resulted from an altercation with a St. Petersburg cab driver during training camp in August 2009.