The Social Security Administration will offer free briefings about the new Medicare prescription drug benefit at Fairfax County library branches throughout October and November. The benefit goes into effect in January.

To sign up, call the host branch two weeks before the briefing. The schedule:

* Saturday, 11 a.m., at Patrick Henry Library, 101 Maple Ave. E., Vienna, 703-938-0405.

* Monday, 11 a.m., at Fairfax City Regional Library, 3915 Chain Bridge Rd., Fairfax, 703-293-6227.

* Oct. 8, 1 p.m., at Lorton Library, 9520 Richmond Hwy. (Route 1), Lorton, 703-339-7385.

* Oct. 14, 2:30 p.m., at Pohick Regional Library, 6450 Sydenstricker Rd., Burke, 703-644-7333.

* Oct. 19, 7:30 p.m., at Great Falls Library, 9830 Georgetown Pike (Route 193), 703-757-8560.

* Oct. 28, 2 p.m., at Tysons-Pimmit Regional Library, 7584 Leesburg Pike (Route 7), Falls Church area, 703-790-8088.

* Oct. 29, 2 p.m., at Reston Regional Library, 11925 Bowman Towne Dr. 703-689-2700.

* Nov. 1, 7:30 p.m., at Kingstowne Library, 6500 Landsdowne Centre, Alexandria section of Fairfax, 703-339-4610.

* Nov. 2, 2 p.m., at Sherwood Regional Library, 2501 Sherwood Hall Lane, Alexandria section, 703-765-3645.

* Nov. 4, 1 p.m., at Thomas Jefferson Library, 7415 Arlington Blvd., Falls Church area, 703-573-1060.

* Nov. 5, 10:30 a.m., at Dolley Madison Library, 1244 Oak Ridge Ave., McLean, 703-356-0770.

* Nov. 7, 10:30 a.m., at Richard Byrd Library, 7250 Commerce St., Springfield, 703-451-8055.

* Nov. 7, 7 p.m., at Herndon Fortnightly Library, 768 Center St., 703-437-8855.

* Nov. 9, 7 p.m., at Martha Washington Library, 6614 Fort Hunt Rd., Alexandria section, 703-768-6700.

* Nov. 12, 1 p.m., at John Marshall Library, 6209 Rose Hill Dr., Alexandria section, 703-971-0010.

* Nov. 12, 2 p.m., at Centreville Regional Library, 14200 St. Germaine Dr. 703-830-2223.

* Nov. 16, 7:30 p.m., at Kings Park Library, 9000 Burke Lake Rd., Burke, 703-978-5600.

* Nov. 18, 11 a.m., at George Mason Regional Library, 7001 Little River Tpk., Annandale, 703-256-3800.

* Nov. 21, 10:30 a.m., at Chantilly Regional Library, 4000 Stringfellow Rd., 703-502-3883.

* Dec. 17, 2 p.m., at Woodrow Wilson Library, 6101 Knollwood Dr., Falls Church area, 703-820-8774.

For information, visit www.co.fairfax.va.us/library/news/news0610.htm.