Drug addiction is a physical problem that can’t be recovered from by determination or ‘trying’ harder. It usually requires undertaking drug rehabilitation for the best results, especially if counselling for other problems is also undertaken. Taking drugs has a physical effect on the brain that is part of why addiction happens.
When drugs are taken the brain is flooded with the chemical dopamine, known as one of the ‘feel-good’ chemicals. This is the same effect that happens when we indulge is pleasurable activities like eating and spending time with our loved ones. Only with drugs, the amount of dopamine released is far greater. Basically, the brain is overstimulated.