gwrtharwydd ( Condition or situation that makes a treatment or procedure inadvisable e.e. “The BNF does not mention allergy to the drug as a contra-indication”. / Aralleirio os oes modd. )langbot langbot
cynghori yn erbyn ( eg Varicella vaccine is contraindicated in pregnancy / ee Cynghorir menywod beichiog i beidio â chael eu brechu rhag varicella )langbot langbot