It is a form of penicillin which is a combination of<unk>  and the local anaesthetic agent<unk> . Following deep intramuscular injection, it is slowly absorbed into the circulation and hydrolysed to<unk>  — thus it is used where prolonged low concentrations of<unk>  are required.
Procaine benzylpenicillin
Oxytetracycline
Phenoxymethylpenicillin
Extended-spectrum penicillin
Benzylpenicillin
Benzathine benzylpenicillin
Doxycycline
Penicillin