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Monkeypox is a zoonotic viral infection caused by monkeypox virus which belongs to the Poxviridae family of genus Orthopoxvirus. Usually the virus transmission happens when the individual comes in contact with the infected person through body fluids, animal lesions, respiratory droplets or through virus contaminated materials. Clinical presentation of the monkeypox has shown significant resemblance to that of smallpox and chickenpox, belonging to the same orthopoxvirus genus but were eradicated during 1980s globally. Monkeypox may lead to a range of medical complications including clinical symptoms like fever, rashes, headaches, back pain, myodynia and swollen lymph nodes. As far as the treatment modalities are concerned, the antiviral therapeutic agents developed for the smallpox treatment, were also permitted to be used for the monkeypox treatment. However, there is no proven treatment for human monkeypox. in the current study, we have focused on designing of a best probable ligand against the target MPXVgp158 (Monkeypox virus protein). Since tecovirimat is an FDA approved compound known as an antipoxviral drug, the study aimed to develop a Monkeypox virus protein MPXVgp158 inhibitor which is bioavailable and biocompatible as well through drug designing using computational tools. Molecular docking (MD) analysis displayed tecovirimat with lesser binding energy, higher non-bonded interaction capability, and more stability against MPXVgp158, with efficient binding mode of interactions. Hence, tecovirimat was adjudged to be the potential candidate against MPXVgp158 inhibition.