Fildena Professional, which contains the active ingredient sildenafil citrate, is not classified as a controlled substance in most countries. Controlled substances are typically drugs that have a high potential for abuse, addiction, or dependence, such as narcotics or certain stimulants. Sildenafil, the active compound in Fildena Professional, does not fall into these categories. However, it is a prescription-only medication in many regions, including the United States, the UK, and India. This means that while it is not illegal to possess if prescribed, buying or using it without a doctor’s approval may be considered unlawful. The reason for prescription control is mainly to ensure safe use, since sildenafil can interact with other medications, particularly nitrates, and may cause serious side effects in some patients. Therefore, while Fildena Professional is not a controlled drug, it is regulated as a prescription medication to prevent misuse and health risks.