Some mysterious cause has brought about a chemical imbalance in the brain. This imbalance must be righted before one can feel well again. The use of antidepressants is not easy. They are not pills that simply cure a problem in a few days or weeks such as antibiotics. They are not pills that have virtually no side-effects like pills for high blood pressure.
Antidepressants take time to take effect.
In the early stages of their use they have various unpleasant side-effects. Each individual responds differently to these medications. Often it proves necessary to change from one antidepressant to another. This changeover can be a distressing experience but one that needs to be endured. The doctor has the expert knowledge to know what dosages are correct and cannot, however much it would be desirable, make the pills act faster than they do.