Answer:
4 signs are:
Changes in physical appearance, such as wearing inappropriate or dirty clothing and a lack of interest in grooming. Altered behavior, such as an increased desire for privacy. Drastic changes in relationships. A noticeable lack of energy when performing daily activities.
4 effects are: Seizures, stroke, mental confusion and brain damage. Lung disease. Problems with memory, attention and decision-making, which make daily living more difficult. Global effects of drugs on the body, such as breast development in men and increases in body temperature, which can lead to other health problems.
4 types are:
stimulants (e.g. cocaine)
depressants (e.g. alcohol)
opium-related painkillers (e.g. heroin)
hallucinogens (e.g. LSD)