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Clinical Trial Experience
Because clinical trials are conducted under prescribed conditions, adverse reaction rates observed in the clinical trial may not reflect the rates observed in practice.
The following table summarizes selected adverse reactions reported in clinical trials at a rate of ≥ 1% for SOLODYN® (minocycline hydrochloride) .
Table 2: Selected Treatment-Emergent Adverse Reactions in
at least 1% of Clinical Trial Subjects
|Adverse Reactions|| SOLODYN® (minocycline hydrochloride)
N = 674 (%)
N = 364 (%)
|At least one treatment-emergent event||379 (56)||197 (54)|
|Headache||152 (23)||83 (23)|
|Fatigue||62 (9)||24 (7)|
|Dizziness||59 (9)||17 (5)|
|Pruritus||31 (5)||16 (4)|
|Malaise||26 (4)||9 (3)|
|Mood alteration||17 (3)||9 (3)|
|Somnolence||13 (2)||3 (1)|
|Urticaria||10 (2)||1 (0)|
|Tinnitus||10 (2)||5 (1)|
|Arthralgia||9 (1)||2 (0)|
|Vertigo||8 (1)||3 (1)|
|Dry mouth||7 (1)||5 (1)|
|Myalgia||7 (1)||4 (1)|
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.
Autoimmune conditions: polyarthralgia, pericarditis, exacerbation of systemic lupus, pulmonary infiltrates with eosinophilia, transient lupuslike syndrome.
Central nervous system: pseudotumor cerebri, bulging fontanels in infants, decreased hearing.
Endocrine: thyroid discoloration, abnormal thyroid function.
Oncology: papillary thyroid cancer.
Renal: reversible acute renal failure.
Preliminary studies suggest that use of minocycline may have deleterious effects on human spermatogenesis [see Nonclinical Toxicology].
Read the Solodyn (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.
Since bacteriostatic drugs may interfere with the bactericidal action of penicillin, it is advisable to avoid giving tetracycline-class drugs in conjunction with penicillin.
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 SOLODYN® (minocycline hydrochloride) on low dose oral contraceptives, hormone levels over one menstrual cycle with and without SOLODYN® (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, can not 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: 1/27/2010
This monograph has been modified to include the generic and brand name in many instances.
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