1 doctor weighed in:

How do the effects of doxycycline last?

1 doctor weighed in
Dr. Michael Ein
Internal Medicine - Infectious Disease

In brief: 3-5 days

Doxycycline has an elimination half life of 15-24 hours.
This is the time it takes the body to excrete 1/2 of the drug. It is felt that a drug is fully eliminated after 5 half lives. So that would be 3 to 5 days for complete elimination of the doxycycline.

In brief: 3-5 days

Doxycycline has an elimination half life of 15-24 hours.
This is the time it takes the body to excrete 1/2 of the drug. It is felt that a drug is fully eliminated after 5 half lives. So that would be 3 to 5 days for complete elimination of the doxycycline.
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