Long Acting penicillin Retarpen

Benzathine penicillin
1.200.000 I.U.(Brand)
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Penicillin (PCN or pen) is a group of antibiotics, derived originally from common moulds known as Penicillium moulds; which includes penicillin G(intravenous use), penicillin V (use by mouth), procaine penicillin, and benzathine penicillin (intramuscular use). Penicillin antibiotics were among the first medications to be effective against many bacterial infections caused by staphylococci and streptococci. They are still widely used today, though many types of bacteria have developed resistance following extensive use.

About 10% of people report that they are allergic to penicillin; however, up to 90% of this group may not actually be allergic.[2] Serious allergies only occur in about 0.03%.[2] Those who are allergic to penicillin are most often given cephalosporin C because of its functional groups.[3] All penicillins are β-lactam antibiotics, which are some of the most powerful and successful achievements in modern science.[3]

Penicillin was discovered in 1928 by Scottish scientist Alexander Fleming.[4] People began using it to treat infections in 1942.[5] There are several enhanced penicillin families which are effective against additional bacteria; these include the antistaphylococcal penicillins, aminopenicillins and the antipseudomonal penicillins. They are derived from Penicillium fungi

Medical uses

The term “penicillin” was used originally for benzylpenicillin, penicillin G. Currently, “Penicillin” is used as a generic term for antibiotics that contain the beta lactam unit in the chemical structure. For example, amoxicillin tablets may be labelled as “a penicillin”. Other derivatives such as procaine benzylpenicillin (procaine penicillin), benzathine benzylpenicillin (benzathine penicillin), and phenoxymethylpenicillin (penicillin V) are also described as “penicillins”. Procaine penicillin and benzathine penicillin have the same antibacterial activity as benzylpenicillin but act for a longer period of time. Phenoxymethylpenicillin is less active against gram-negative bacteria than benzylpenicillin.[7][8] Benzylpenicillin, procaine penicillin and benzathine penicillin can only be given by intravenous or intramuscular injections, but phenoxymethylpenicillin can be given by mouth because of its acidic stability.[9]