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Results for “Methacycline”

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At least 19 recordsLinked to original sources
PubMed1976

Methacycline compared with ampicillin in acute bacterial exacerbations of chronic bronchitis. A double-blind crossover study.

In order to objectively document the accepted clinical efficacy of ampicillin in treating bacterial exacerbations of chronic bronchitis, as well as to evaluate the efficacy of methacycline, a double-blind crossover study was designed. Twenty patients with chronic bronchial disease were treated for two separate acute bacterial exacerbations, once with 2 gm of ampicillin daily, and once with 600 mg of methacycline daily, for 14 days. There were a few significant differences when comparing the efficacy of the antimicrobials. For example, the daily volume of sputum significantly went from 35.6 ml initially to 20.5 ml at the end of treatment with methacycline, and from 37.4 to 18.0 ml with ampicillin. Sputum neutrophils excreted per day went from 446 to 147 million with methacycline and from 433 to 94 million with ampicillin. Gram-positive diplococci and cocci on gram stains of sputum significantly decreased form 10.6 to 3.3 with methacycline and from 16.8 to 2.1 with ampicillin. This investigation objectively documents with accepted clinical efficacy of ampicillin and proves methacycline to be an equally effective agent.

Acute Disease↗
PubMed1979

[Comparative evaluation of methacycline hydrochloride capsules and tablets according to their dissolubility and rate of solution].

Desintegration and dissolution of capsules and tablets of methacycline hydrochloride were studied. The study on solubility of methacycline hydrochliride capsules filled with methacycline granulate or powder according to the same formula showed that the rate of the antibiotic liberation from the capsules filled with the powder decreased during storage while that from the capsules filled with the granulate did not change. Investigation of the effect of the mass packing value in a drop on the antibiotic liberation from the capsules showed that an increase in the packing coefficient above 1.38 resulted in a marked decrease in the rate of methacycline liberation from the capsules filled with the granulate. No correlation between desintegration and dissolution of methacycline capsules and tablets was found.

Capsules↗
PubMed1987

[A case of severe methacycline damage to the liver and bone marrow].

A case of a male patient with bronchopneumonia incorrectly treated for a long time with methacycline (rondomycin), an oxytetracycline drug, is reported. methacycline was applied in a dose of 8 capsules daily (2 capsules 4 times) in the course of 2 1/2 months, the total dose amounting to about 150 g. The patient developed severe toxic hepatitis as a result of this incorrect treatment. The hepatitis was manifested by jaundice and cytolysis. The bone marrow was also affected--hypoplasia marked by combined depression of leuko-, erythro- and thrombopoiesis and peripheral pancytopenia. In addition chloramphenicol treatment was applied which increased the toxic impairment of the liver and the bone marrow. The liver and bone marrow impairment are most probably due to the direct toxic action of methacycline applied for a very long time in an unusually high dose.

Acute Disease↗
PubMed1972

Activity of methacycline, related tetracyclines, and other antibiotics against various L-forms and their parent bacteria in vitro.

The activity of methacycline against microbial L-forms and their parent bacteria was compared with that of oxytetracycline, chlortetracycline, tetracycline, and demethylchlortetracycline, as well as with that of 22 other antibiotics which included examples of major groups of antibiotics. The L-forms and bacteria used were Streptococcus faecalis, S. faecium, S. faecalis var. zymogenes, Staphylococcus aureus (three strains), Proteus mirabilis (two strains), Pseudomonas aeruginosa, Escherichia coli (two strains), Sarcina flava, Serratia marcescens, and Klebsiella pneumoniae. The five tetracyclines had similar activities and were more active against L-forms than bacterial forms, except that the bacterial form of S. flava was more susceptible than the L-form. In general, other antibiotics (except the penicillins) were more active against L-forms than bacterial forms. There were certain exceptions where the bacterial form was more susceptible than the L-form. These included the effect of polymyxin B and colistin on P. aeruginosa, E. coli, and P. mirabilis, and the effect of gentamicin on P. aeruginosa, E. coli, S. flava, and S. marcescens.

Anti-Bacterial Agents↗
PubMed1989

[Treatment of cutaneous leishmaniasis with methacycline and doxycycline (vibramycin)].

Sixty-nine patients suffering from acute necrotic cutaneous leishmaniasis have been effectively treated with methacycline, 60 ones with doxycycline. Many parameters of these drug's efficacies are similar to those of monomycin, the most active drug for cutaneous leishmaniasis. Therapy with the afore-said antibiotics, in combination with methyluracil, an immunocorrecting drug, is a simple and available effective method, that may be used for outpatient treatment of leishmaniasis patients.

Adolescent↗
PubMed1980

Methacycline hyperpigmentation: a five-year follow-up.

A five-year follow-up is presented of a unique material of patients who acquired a greyish black hyperpigmentation during long-term methacycline therapy for chronic bronchitis. The melanosis disappeared in cases in which tetracycline therapy was discontinued during the observation period but not in those in which doxycycline had been substituted. In two autopsy cases pigment deposits were also found in cartilage and atherosclerotic lesions. Overall clinical and microscopic findings suggest a similarity to the pigmentation occurring in iatrogenic ochronosis.

Bronchitis↗
PubMed1978

[Comparative toxicity of oxytetracycline and its semisynthetic derivatives, methacycline and doxycycline].

The acute toxicity parameters of oxytetracycline and its semisynthetic derivatives was determined on laboratory animals of various species. The three antibiotics were described as belonging to the group of low toxic compounds according to the classification adopted in industrial toxicology. However, the absolute values of LD50 indicated that doxycycline was 5.6 or 2.8 times more toxic than oxyteyracycline or methacycline respectively. In addition, doxycycline had the most pronounced hepatoxic effect.

Animals↗