The study analyzing the effectiveness of media law in Nigeria with a particular focus on Journalists in Lagos State. The right of citizens to know what is happening in the corridor of government is one of the factors that drives journalists while a tool used by the government to restrict journalists is to classify some documents and information as “Official Secret Act”, “National Security” and “Internal Interest”. These are used to cloak the government’s illegal spying activities. The study was anchored on Social Responsibility Theory, Source Credibility Theory and Democratic Participant Theory. Survey research method was used while 186 copies of questionnaire were administered to journalists in Lagos. The data collected were analysed in frequency and percentage tables. Findings show that journalists now enjoy more freedom compared to what the situation looks like in the past while, access to public records and documents have increased to some extent. However, despite the FOI Act, journalists and media professionals are still facing various degrees of harassment, intimidation, killing, arrest and forcefully pressure to disclose their source of information among other. The study recommended that journalists should study the new freedom of information law and see how they can adopt to the new system while media houses and media associations should as well educate, organize workshops and seminars for their staff on how to make use of the law in shaping the practice of journalism in this democratic era.