The major side effects of Paxidep (paroxetine) include: Worsening of depression, development of suicidal tendency, tremors, asthenia, dry mouth, dizziness, bleeding, loss of interest in sex, involuntary movement of muscles, fits, blurred vision, premenstrual disorder. Severe agitation-type events include disinhibition, emotional lability, hostility, aggression and depersonalisation, hallucinations etc.
The major side effects of Espazine (trifluoperazine) are: Muscle spasms, involuntary movements of muscles, eye (retina) disorders, menstrual irregularities, blood disorders, jaundice, fits, skin pigmentation.
Neuroleptic malignant syndrome (serious, can be fatal).
As you can see loss of libido (interest in sex) is one of the side effects of Paxidep.