Alleles for a particular phenotype determine what characteristic an organism will express, as with the following example where. 1  Chromosome 1 contains an allele for blonde hair. 2  Chromosome 2 contains an allele for brown hair. 3  Chromosome 3 contains an allele for blue eyes. 4  Chromosome 4 contains an allele for brown eyes.
Because of the patient's smoking history and abnormal chest radiograph, a neoplasm was initially suspected as a cause of SIADH. The head trauma was too remote to be of concern. Although 1 case of risperidone-associated hyponatremia has been reported, the risk seems low with this agent and with olanzapine.
ated with its improvement. The efficacy of risperidone in the treatment of this condition is controversial, as negative results have been reported. Herein we present a schizophrenia case with polydipsia and hyponatremia that was successfully treated with risperidone. Keywords: Schizophrenia, risperidone, polydipsia, hyponatremia, antipsychotics.