Weight gain is inhibited by administering to a person in need thereof an effective amount of entacapone ((2E)-2-cyano-3-(3,4-dihydroxy-5-nitrophenyl)-N,N-diethylprop-2- enamide), or a pharmaceutically-acceptable salt thereof, particularly in conjunction with a second, different anti-weight gain medicament. Pharmaceutical compositions comprise entacapone copackaged or coformulated with a second, different anti-weight gain medicament.
