Skip to Content

Drug interactions between doxycycline and Tri-Estarylla

Results for the following 2 drugs:
Tri-Estarylla (ethinyl estradiol/norgestimate)

Interactions between your drugs


doxycycline ↔ ethinyl estradiol

Applies to:doxycycline and Tri-Estarylla (ethinyl estradiol/norgestimate)

Antibiotics such as doxycycline may reduce the effects of ethinyl estradiol in some women. If you are using ethinyl estradiol for birth control, you may be at increased risk for pregnancy or breakthrough bleeding. Talk to your healthcare provider to determine if you should use an alternative or additional form of birth control during treatment with doxycycline. In addition, some birth control preparations may include "placebo" non-hormonal pills that contain iron. If you are taking these iron pills during treatment with doxycycline, you should separate the dosing times by several hours so that the iron does not interfere with absorption of the antibiotic. Ask your doctor or pharmacist for information on when best to take these medications. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Switch to professional interaction data

Drug and food interactions


ethinyl estradiol food

Applies to: Tri-Estarylla (ethinyl estradiol / norgestimate)

Consumer information for this minor interaction is not currently available. Some minor drug interactions may not be clinically relevant in all patients. Minor drug interactions do not usually cause harm or require a change in therapy. However, your healthcare provider can determine if adjustments to your medications are needed.

For clinical details see professional interaction data.

Therapeutic duplication warnings

No therapeutic duplications were found for your selected drugs.

Drug Interaction Classification

The classifications below are a guideline only. The relevance of a particular drug interaction to a specific patient is difficult to determine using this tool alone given the large number of variables that may apply.
Major Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit.
Moderate Moderately clinically significant. Usually avoid combinations; use it only under special circumstances.
Minor Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan.
Unknown No information available.

Do not stop taking any medications without consulting your healthcare provider.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.