It is half white half black capsul
I think you mean E 122 as in this image
Pill imprint E 122 has been identified as Nitrofurantoin monohydrate macrocrystals 100 mg.
Nitrofurantoin is used in the treatment of bladder infection; prevention of bladder infection and belongs to the drug class urinary anti-infectives. There is no proven risk in humans during pregnancy.
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