import re
a_string = "Anakinra 100 mg, gentechnologisch hergestellt aus E. coli."
pattern = 'Anakinra'
print ( [f"{x}{y}" for x,y in re.findall(rf"(?:{pattern})\s*(\d+(?:[.,]\d+)*)\s*(g|mg|)", a_string)] )
aW1wb3J0IHJlCmFfc3RyaW5nID0gIkFuYWtpbnJhIDEwMCBtZywgZ2VudGVjaG5vbG9naXNjaCBoZXJnZXN0ZWxsdCBhdXMgRS4gY29saS4iCnBhdHRlcm4gPSAnQW5ha2lucmEnCnByaW50ICggW2Yie3h9e3l9IiBmb3IgeCx5IGluIHJlLmZpbmRhbGwocmYiKD86e3BhdHRlcm59KVxzKihcZCsoPzpbLixdXGQrKSopXHMqKGd8bWd8KSIsIGFfc3RyaW5nKV0gKQo=