Do i need to take antibiotics after root canal?

Sometimes: When a tooth is infected or is non vital (dead) antibiotics are typically prescribed prior, during and after the root canal is performed. If the tooth is alive and root canal is performed, often antibiotics are not indicated.

Sometimes: If there is an active infection with an acute abscess associated with the tooth, your dentist or endodontist may prescribe antibiotics for you to take after having root canal therapy.

Depends: Sometimes you do not. But if there is an access present, then your doctor may consider an antibiotic.

RCT ; antibiotics?: When infections are present or likely to occur or be present, an antibiotic should be prescribed. Whether or not to prescribe antibiotics is based upon the judgment and philosophy of the treating dentist as well as the specific circumstances of both patient and dental conditions. Some medical conditions suggest antibiotic prophylaxis as well.

Often: Many Endodontists recommend this if the infection is particularly severe or long-standing. Often they are prescribed before the treatment, as well.