Different people react differently to antidepressants and tranquilisers. The side-effects can be harsh on some and mild on others. However, the medications used to cure depression and calm people down are considered relatively safer to use than other varieties of selective serotonin reuptake inhibitors (abbreviated as SSRI). It is for this reason that people often have to be rehabilitated for the excessive usage, abuse or even overdose of such drugs. An overdose of such substances may have the opposite effects to the ones these substances are intended to have.
To sum up, some of the common side-effects of antidepressants and tranquilisers are dry mouth, urinary retention, blurring of vision, constipation, sedation, disruption of sleep, increase in weight, headache, nausea, diarrhoea or disturbances in the gastrointestinal system, pain in the abdomen, the inability to have an erection or an orgasm (the latter is common to both men and women), loss of libido, agitation, anxiety, drowsiness, confusion, a feeling of light-headedness, hostility, hallucinations, lethargy, loss of memory, disorganised thinking, irritability, vomiting, sweating, body aches, cramps in the stomach, influenza-like symptoms, palpitations in the heart, seizures, psychosis, delusions, paranoia and depression.
To sum up, some of the common side-effects of antidepressants and tranquilisers are dry mouth, urinary retention, blurring of vision, constipation, sedation, disruption of sleep, increase in weight, headache, nausea, diarrhoea or disturbances in the gastrointestinal system, pain in the abdomen, the inability to have an erection or an orgasm (the latter is common to both men and women), loss of libido, agitation, anxiety, drowsiness, confusion, a feeling of light-headedness, hostility, hallucinations, lethargy, loss of memory, disorganised thinking, irritability, vomiting, sweating, body aches, cramps in the stomach, influenza-like symptoms, palpitations in the heart, seizures, psychosis, delusions, paranoia and depression.