No: If the antibiotic was caused by a flare-up post root canal, then it should be fine. However, if the infection was caused by bacteria that may still be in the tooth, or a missed canal, the infection can come back. If the tooth is not restored properly with a permanent filling, the infection can come back.
For other people with similar names, see Sarah Allen (disambiguation). Sara Allen is an American songwriter best known for her work with the duo Hall & Oates. Though never married, she was in a long-time relationship with Daryl Hall until 2001. She contributed to many of the duo's hit singles, including Private Eyes, I Can't Go for That (No Can Do) and Maneater.
Allen Ludden was the first child of Elmer Ellsworth, a Nebraska native living in Mineral Point, Wisconsin and working as an ice dealer; and his wife Leila M. Allen, a Wisconsin native and housewife. Elmer Ellsworth died the next winter at age 26, a victim of the worldwide Spanish flu epidemic, on January 6, 1919.