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Repeated spitting do not appear simple symptom of depression
to me. It may occur in illness like anxiety
Your low sex desire may because of psychological problem or levoosulpride or both. It is better to review your case with psychiatrist
with current symptoms as change of medicine may require in your case.
I hope this information has been both informative and helpful for you.
Wish you Good Health.
Dr. Ashish Mittal