Drugs and their effects

When predicting the effects of a drug we need to consider the combined influence of the drug, the person and the place where they are using it. For example, if we consider alcohol, it will have a certain effect when consumed as a toast to celebrate a friend's wedding. It may well have a totally different effect when consumed alone, after an argument with friend.

Factors that influence the effects of drugs are:

The individual
  • has the user developed a tolerance for the drug
  • their physical health status, eg. liver
  • their age and sex
  • their cultural background
  • psychological factors such as expectations, mental states, social status, motives, personality, current mood and past experiences

The substance
  • the amount, strength and purity of the drug
  • any other drugs taken at the same time