Since taking 20mg Citalopram for almost 2 months now I have . had a high sex drive some meds have decreased and even caused me to Getting My Sex Drive Back To Normal After Citalopram. Mar 3, - Men are also affected by the serotonin stabilization that SSRIs cause. Common side effects in men include decreased libido and difficulty getting an erection. Men taking antidepressants also report delayed or blocked orgasm. Some drugs, like Celexa, can cause a man's sperm count to drop to nearly zero.Medications · Causes.