You are allergic to doxycycline, related chemicals, related medications (such as minocycline or tetracycline), or any inactive ingredients used in making doxycycline. Your healthcare provider or pharmacist has a list of the inactive ingredients.
You are treating a child less than 8 years of age (except in extreme and necessary cases).
You are pregnant or breastfeeding.
You have liver failure or liver disease.
Doxycycline Precautions and Warnings: A Summary
There are a number of situations in which doxycycline should not be taken, along with several precautions and warnings people should be aware of before taking the drug. However, it is possible that not all doxycycline precautions and warnings were discussed in this article. Therefore, you should talk with your healthcare provider about any specific ones that may apply to you.