Natural Health Research

Naturopathic Medicine
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Doxycycline, Bio-Tab, Doryx, Doxy-Caps, Doxychel, Monodox


Doxycycline is a tetracycline antibiotic.


antibiotic, tetracycline


Doxycycline is frequently used to treat chronic prostatitis, sinusitis, syphilis, pelvic inflammatory disease, acne and rosacea. In addition it is used in the treatment and prophylaxis of Bacillus anthracis (anthrax) and malaria.

Side Effects

anorexia, candidiasis, diarrhea, elevated hepatic enzymes, eosinophilia, Fanconi syndrome, hepatitis, increased intracranial pressure, injection site reaction, nausea/vomiting, neutropenia, paresthesias, photosensitivity, Stevens-Johnson syndrome, thrombophlebitis, vitamin B deficiency,

Drug-Vitamin-Herb Interactions

Negative interactions:

Potassium Citrate
Potassium Citrate makes urine less acidic, may decrease effectiveness of tetracycline antibiotics.

St JohnÕs Wort and Dong Quai
St JohnÕs Wort and Dong Quai can cause sensitivity to sunlight, which may add to side effects of tetracyclines.

Minerals can interfere with absorption of tetracycline antibiotics. Take separately.

Positive interactions:

Lactobacillus acidophilus
Probiotics replace normal intestinal bacteria, which may reduce the side effect of diarrhea associated with antibiotics.

Sacchromyces boulardii
Sacchromyces boulardii may prevent antibiotic-related diarrhea.

Vitamin K
Antibiotics may cause vitamin K deficiency by destroying the beneficial bacteria that produce it.




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