Drug Interactions between doxycycline and Synthroid
This report displays the potential drug interactions for the following 2 drugs:
- doxycycline
- Synthroid (levothyroxine)
Interactions between your drugs
No interactions were found between doxycycline and Synthroid. However, this does not necessarily mean no interactions exist. Always consult your healthcare provider.
doxycycline
A total of 207 drugs are known to interact with doxycycline.
- Doxycycline is in the following drug classes: miscellaneous antimalarials, tetracyclines.
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Doxycycline is used to treat the following conditions:
- Acne
- Actinomycosis
- Amebiasis
- Anthrax
- Anthrax Prophylaxis
- Bacterial Infection
- Bartonellosis
- Bronchiectasis
- Bronchitis
- Brucellosis
- Bullous Pemphigoid
- Cervicitis
- Chancroid
- Chlamydia Infection
- Cholera
- Cutaneous Bacillus anthracis
- Ehrlichiosis
- Enterocolitis
- Epididymitis, Sexually Transmitted
- Gastroenteritis
- Gonococcal Infection, Uncomplicated
- Granuloma Inguinale
- Inclusion Conjunctivitis
- Lichen Planopilaris
- Lyme Disease
- Lyme Disease, Arthritis
- Lyme Disease, Carditis
- Lyme Disease, Erythema Chronicum Migrans
- Lyme Disease, Neurologic
- Lymphogranuloma Venereum
- Malaria
- Malaria Prevention
- Melioidosis
- Mycoplasma Pneumonia
- Nongonococcal Urethritis
- Ocular Rosacea
- Ornithosis
- Pelvic Inflammatory Disease
- Pemphigoid
- Pemphigus
- Periodontitis
- Plague
- Pleural Effusion
- Pneumonia
- Proctitis
- Prostatitis
- Psittacosis
- Q Fever
- Rabbit Fever
- Rheumatoid Arthritis (off-label)
- Rickettsial Infection
- Rosacea
- Skin and Structure Infection
- Skin or Soft Tissue Infection
- STD Prophylaxis
- Syphilis, Early
- Syphilis, Latent
- Tertiary Syphilis
- Trachoma
- Upper Respiratory Tract Infection
- Urinary Tract Infection
Synthroid
A total of 211 drugs are known to interact with Synthroid.
- Synthroid is in the drug class thyroid drugs.
- Synthroid is used to treat the following conditions:
Drug and food interactions
levothyroxine food
Applies to: Synthroid (levothyroxine)
The timing of meals relative to your oral levothyroxine dose can affect the absorption of the medication. Therefore, levothyroxine should be taken on a consistent schedule with regard to time of day and relation to meals to avoid large fluctuations in blood levels, which may alter its effects. In addition, absorption of levothyroxine may be decreased and/or delayed by foods such as soybean flour, cotton seed meal, walnuts, dietary fiber, calcium, calcium fortified juices and grapefruit or grapefruit juice. These foods should be avoided within several hours of dosing if possible. 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.
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.
levothyroxine food
Applies to: Synthroid (levothyroxine)
Using multivitamin with minerals together with levothyroxine may decrease the effects of levothyroxine. You should separate the administration of levothyroxine and multivitamin with minerals by at least 4 hours. If your doctor does prescribe these medications together, you may need a dose adjustment or special test to safely use both 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.
doxycycline food
Applies to: doxycycline
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
Report options
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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