Known side effects of SERNEXT 25 TAB include Delayed ejaculation , Erectile dysfunction , Indigestion , Insomnia (difficulty in sleeping) , Low sexual desire , Nausea , Tremors , Diarrhea , Increased sweating , Loss of appetite , Sleepiness , Ta.... Not everyone experiences these side effects.
This is not an exhaustive list. Consult your doctor if you notice any unusual symptoms.