Hi thanks for your question You have developed loss of libido (desire to have sex) and you testosterone level is 1.9,which is very low. You have been prescribed, No 1 Ezerex sachet No.2 Mesterolone and No.3 carbergoline Ezerex sachet is combination of three components,L carnithine,L arginine and vitamine B3 that is nicotin Mesterolone is a synthetic androgen with antidepressant properties Cabergoline is is used to treat disorder associated with high levels of prolectin. In combination these medicine are used to improve sperm count,treat erectile dysfunction,and improve testosterone level. Some studies have proved their beneficial effect in male infertility. Side effects, ezertex are a nutritional supplement, no major side effects. Side effects of other medicine include; Drowsiness,light headedness,fainting,constipation,indigestion Mild stomach pain,nausea,tiredness or weakness and vomiting Some patient taking cabergoline develop behavioral changes (increased gambling or sexual urges) Duration of therapy varies from patient to patient, you can discuss with your treating physician. Hope this answers your question.