Based on the information there are two set of questions and let me answer one by one.
1) Low motility is major issue for not having child, but it can be over come by various other techniques like artificial insemination
of embryo (test tube baby - were a fertilization occurs in the test tube in controlled situation ) for further information regarding that contact nearest infertility
2) NOW CETRIZINE
is antihistaminic drug which helps in decreasing the "URTICARIA", but not known for any of the sexual side effects.
For the loss of interest in sexual activity, LOW level of TESTOSTERONE
is mostly responsible in the middle age man. Following needs to be done to get back on track.
a) Consult local physician.
b) Level of testosterone needs to be checked,
c) If found low just simple application of hormonal replacement gel can do the magic of getting normal sexual desire.
Hope things get better soon.
Dr. JAY PATEL