When Risperidone is co-administered with enzyme inducers (e.g., carbamazepine), the dose of Risperidone should be increased up to double the patient's usual dose. It may be necessary to decrease the Risperidone dose when enzyme inducers such as carbamazepine are discontinued [see Drug Interactions (7.1)].
Feo is an adjective meaning ugly or unattractive in Spanish. Because the adjective ends in an o the adjective refers to a masculine noun. If you wanted to describe a feminine noun as ugly, you would end the adjective with an a, i.e.  fea..
Also, when referring to people in Spanish, the personal a is used and/or some kind of direct object pronoun. (Yo) te amo a ti means I love you. you can say te amo or amo a ti So if whoever said yo gusto tu is trying to say i like you, or you like me he or she totally messed it up.