Drug Interactions between doxycycline and Lo Loestrin Fe
This report displays the potential drug interactions for the following 2 drugs:
- doxycycline
- Lo Loestrin Fe (ethinyl estradiol/norethindrone)
Interactions between your drugs
doxycycline ethinyl estradiol
Applies to: doxycycline and Lo Loestrin Fe (ethinyl estradiol / norethindrone)
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. Be sure to alert your doctor if you are having any vomiting and/or diarrhea as this too can impact how well ethinyl estradiol works. Talk to your doctor or pharmacist to determine if you should use an alternative or additional form of birth control during or after treatment with doxycycline. In addition, some birth control preparations may include "placebo" non-hormonal pills that contain iron. If you are taking these iron-containing 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. If you are using ethinyl estradiol for a purpose other than birth control, please let your doctor know if you have any questions or notice any changes in how well ethinyl estradiol is working. 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.
Drug and food interactions
norethindrone food
Applies to: Lo Loestrin Fe (ethinyl estradiol / norethindrone)
Grapefruit juice may increase the blood levels of certain medications such as norethindrone. You may want to limit your consumption of grapefruit and grapefruit juice during treatment with norethindrone. However, if you have been regularly consuming grapefruit or grapefruit juice with the medication, then it is advisable for you to talk with your doctor before changing the amounts of these products in your diet, as this may alter the effects of your medication. Contact your doctor if your condition changes or you experience increased side effects. Orange juice is not expected to interact.
doxycycline food
Applies to: doxycycline
Iron can bind to doxycycline in the gastrointestinal tract, which may prevent their absorption into the bloodstream and possibly reduce their effectiveness. To avoid or minimize the interaction, iron-containing medications and doxycycline should preferably be taken at least three to four hours apart in most cases. Talk to your doctor if you have any questions or concerns, or if you have trouble separating the dosing times. Your doctor may be able to prescribe alternatives that do not interact. 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.
ethinyl estradiol food
Applies to: Lo Loestrin Fe (ethinyl estradiol / norethindrone)
Information for this minor interaction is available on the professional version.
doxycycline food
Applies to: doxycycline
Information for this minor interaction is available on the professional version.
ethinyl estradiol food
Applies to: Lo Loestrin Fe (ethinyl estradiol / norethindrone)
Information for this minor interaction is available on the professional version.
norethindrone food
Applies to: Lo Loestrin Fe (ethinyl estradiol / norethindrone)
Information for this minor interaction is available on the professional version.
Therapeutic duplication warnings
No warnings were found for your selected drugs.
Therapeutic duplication warnings are only returned when drugs within the same group exceed the recommended therapeutic duplication maximum.
See also
Drug Interaction Classification
Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit. | |
Moderately clinically significant. Usually avoid combinations; use it only under special circumstances. | |
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. | |
No interaction information available. |
Further information
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
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