Clinical Trials Experience
Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in clinical practice.
The following table summarizes selected adverse reactions reported in clinical trials at a rate of ≥ 1% for minocycline hydrochloride.
Table 2: Selected Treatment-Emergent Adverse Reactions in
at least 1% of Clinical Trial Subjects
|Adverse Reactions|| Minocycline hydrochloride
N = 674 (%)
N = 364 (%)
|At least one treatment-emergent event||379 (56)||197 (54)|
|Headache||152 (23)||83 (23)|
The following adverse reactions have been identified during post approval use of minocycline hydrochloride. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure.
Adverse reactions that have been reported with minocycline hydrochloride use in a variety of indications include:
Skin and hypersensitivity reactions: fixed drug eruptions, balanitis, erythema multiforme, Stevens-Johnson syndrome, anaphylactoid purpura, photosensitivity, pigmentation of skin and mucous membranes, hypersensitivity reactions, angioneurotic edema, anaphylaxis, DRESS syndrome [see WARNINGS AND PRECAUTIONS].
Central nervous system: pseudotumor cerebri, bulging fontanels in infants, decreased hearing.
Endocrine: brown-black microscopic thyroid discoloration, abnormal thyroid function.
Oncology: thyroid cancer.
Renal: reversible acute renal failure.
Read the Ximino (minocycline hydrochloride) Side Effects Center for a complete guide to possible side effects
Because tetracyclines have been shown to depress plasma prothrombin activity, patients who are on anticoagulant therapy may require downward adjustment of their anticoagulant dosage.
The concurrent use of tetracycline and methoxyflurane has been reported to result in fatal renal toxicity.
Antacids and Iron Preparations
Absorption of tetracyclines is impaired by antacids containing aluminum, calcium or magnesium and iron-containing preparations.
Low Dose Oral Contraceptives
In a multi-center study to evaluate the effect of minocycline hydrochloride (administered as another extended-release formulation which is bioequivalent to Ximino) on low dose oral contraceptives, hormone levels over one menstrual cycle with and without minocycline hydrochloride 1 mg/kg once-daily were measured. Based on the results of this trial, minocycline-related changes in estradiol, progestinic hormone, FSH and LH plasma levels, of breakthrough bleeding, or of contraceptive failure, cannot be ruled out. To avoid contraceptive failure, female patients are advised to use a second form of contraceptive during treatment with minocycline.
Drug/Laboratory Test Interactions
False elevations of urinary catecholamine levels may occur due to interference with the fluorescence test.
Last reviewed on RxList: 7/30/2012
This monograph has been modified to include the generic and brand name in many instances.
Additional Ximino Information
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