160mu Benzylpenicillin Potassium for Injection -Benzylpenicillin

Model NO.
Powder injection
Transport Package
1.6mu * 50PCS * 20 Boxes
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Instructions of Benzylpenicillin Potassium for Injection

Veterinary prescription drugs
 [Veterinary Drug Name]

Generic name: Benzylpenicillin Potassium for Injection
Trade name: Anqing
English name: Benzylpenicillin Potassium for Injection
Chinese pinyin name: Zhusheyong Qingmeisujia
[Major Composition] Benzylpenicillin Potassium
[Description] White crystalline powder
[Pharmacological Actions] Pharmacology  Benzylpenicillin is a bactericidal antibiotic with a strong antibacterial activity and its antibacterial mechanism is mainly to inhibit the synthesis of cell wall mucopeptide of bacteria. The growing sensitive bacteria split actively and the cell wall is in biosynthesis phase. The disturbance of mucopeptide synthesis makes it fail to form the cell wall in the presence of benzylpenicillin and causes cell membrane rupture and death under the osmotic pressure. The non-growing and breeding bacteria are not required to synthesize the cell wall at this time, thus benzylpenicillin has no bactericidal effect, so it should be avoided to clinically combine this kind of “bactericide for breeding period” like benzylpenicillin with the “fast-effect bacteriostat” inhibiting the growth and breeding of bacteria (e.g. florfenicol, tetracyclines and erythromycin etc.). The latter will inhibit the growth of the bacteria so that benzylpenicillin does not function.
Benzylpenicillin is a narrow-spectrum antibiotic, which mainly works for various gram-positive bacteria and few gram-negative cocci. The major sensitive bacteria include staphylococcus, streptococcus, bacillus rhusiopathiasuis, corynebacteria, clostridium tetani, actinomycete, bacillus anthracis and spirochete etc. Benzylpenicillin is insensitive to mycobacteria, mycoplasma, chlamydia, rickettsia, nocardiosis, fungus and virus.
Pharmacokinetics  After oral administration, benzylpenicillin is easy to hydrolyze and difficult to absorb in the condition of stomach acid, with a 15-30% bioavailability on an empty stomach and less absorption on a full stomach, and the common dosage cannot reach the effective plasma concentration. Benzylpenicillinpotassium salt  is absorbed rapidly after intramuscular injection and reaches the plasma peak concentration in 15-30min. The plasma concentration maintains above 0.5μg/ml for 6-7h after intramuscular injection. Benzylpenicillin can be widely distributed in all tissues and moved into the fetal circulation, with higher concentration in kidney, liver, lung, muscle, small intestine and spleen and lower one in skeleton, saliva and milk. It is difficult to go into the cerebrospinal fluid and its concentration in normal cerebrospinal fluid is only 1-3% of plasma concentration, whereas the concentration in cerebrospinal fluid is up to 5-30% of plasma concentration when inflammation. The concentration of benzylpenicillin in milk can be 5-20% of plasma concentration. Benzylpenicillin of breast injection can be massively absorbed in the first few hours, but the milk can maintain the inhibitory concentration for a considerable time. It is reported that in case of injecting 0.1MU benzylpenicillin aqueous solution in the breast, it may maintain at 4.26u/ml in the milk for 24h.
Benzylpenicillin is marginally metabolized in the liver and mostly excreted without metabolism. Approximately 50-75% of benzylpenicillin is excreted from kidney under the condition of normal renal function, wherein 90% is secreted via kidney tubules. And it will be rapidly eliminated in the body due to its quick excretion. The plasma protein binding rate of benzylpenicillin is approximately 50%. Due to short half-life and minor differences among species, the half-life of all livestock is approximately 0.5-1.2h. The apparent volume of distribution is small, generally 0.2-0.3L/kg, thus, the plasma concentration is high and the tissue concentration is low.
 [Indications] It is mainly used for the treatment of both gram-positive bacterial infections and infections such as actinomycete and leptospira, e.g. swine erysipelas, emphysematous gangrene, malignant edema, actinomycosis, strangles, necrobacillosis, leptospirosis and mastitis, skin soft tissue infection, arthritis, hysteritis, pyelonephritis, pneumonia, sepsis and tetanus. It is appropriate to combine with tetanus antitoxin for the treatment of tetanus.
 [Dosage and Administration] Intramuscular injection  single dosage  per 1kg weight  10,000-20,000 units for horse and cattle  20,000-30,000 units for sheep, swine, foal and calf  30,000-40,000 units for canine and cat  50,000 units for poultry  2-3 times a day  for 2-3 consecutive days
Add appropriate sterile water for injection to dissolve before use.
[Adverse reactions](1)The major adverse reaction is allergy, which may occur in most livestock, with a low occurrence rate. Local reactions represent edema and pain of injection site, general reactions are urticaria and rash, and severe cases may lead to shock or death. (2)For some animals, benzylpenicillin may induce superinfection of gastrointestinal tract.
 [Precautions] (1) Benzylpenicillin potassium is soluble in water, the aqueous solution is unstable and easy to hydrolyze, and its hydrolysis rate will speed up with the increase of temperature, thus the injection shall be prepared before use. If it is necessary to store the injection, it shall be placed in the refrigerator (2-8ºC) for 7 days, and it can be stored at room temperature for only 24h.
(2)The interaction and incompatibility with other drugs should be understood so as not to affect the efficacy of penicillin
(2) It is necessary to understand the interactions and incompatibility with other drugs so as not to affect the efficacy of benzylpenicillin .
 (3) 100 MU (0.625g) of benzylpenicillin potassium contains 0.065g of potassium ion, so large-dose injection may cause hyperkalemia. It may cause adverse effects to the livestock with renal hypofunction or cardiac insufficiency.
[Withdrawal Time] Cattle, sheep, swine and poultry: 0 day; cattle and sheep: 72h of milk withdrawal time
[Specification] Calculate with C16H17KN2O4S 1.0g (160MU)
[Package] 1.6MU × 50pcs × 20 boxes