At high doses<unk>  penicillin can cause seizures and CNS abnormalities due to<unk>  present in it.
Procaine benzylpenicillin
Oxytetracycline
Phenoxymethylpenicillin
Extended-spectrum penicillin
Benzylpenicillin
Benzathine benzylpenicillin
Doxycycline
Penicillin