1.A.
Mental confusion Hypothermia Vomiting Seizure Slow/ irregular breathing
1.B.
After you see those symptoms
2.a.
It is a compulsive urge to drink alcohol. The person will drink almost every day and it may interfere with their job or family.
2.B.
Lying About How Much they DrinkHiding They’re  Drinking or Hiding AlcoholLosing They’re  Job Due to Alcoholic BehaviorLosing Their  Spouse or Partner Due to Alcoholism Trying to Quit Without Success
2.C. Alcoholic Anonymous
3.A.
Lung CancerCOPD.Heart Disease. Stroke. ...Aortic Aneurysm. Oropharyngeal Cancer. Esophageal Cancer.Cataracts.Liver Cancer.Diabetes.
3.B.
decreased appetitedizzinessnausea, abdominal cramps and vomitingheadachecoughing, due to smoke irrigationitation.
4.A. (I picked hallucinogen)
The drug hallucinogen is a psychoactive agent which can cause hallucinations, perceptual anomalies, and other substantial subjective changes in thoughts, emotion, and consciousness.
4.B.
It causes classic hallucinogens, like LSD, affect serotonin. Serotonin is a neurotransmitter that helps control functions such as behavior, mood and perception. LSD and similar drugs over-stimulate serotonin, flooding the brain with signals that mimic psychosis and break down the user's inhibitions.
4.C.
Increased blood pressure, heart rate, and body temperatureDizziness and sleeplessnessLoss of appetite, dry mouth, and sweatingNumbness, weakness, and tremorsimpulsiveness and rapid emotional shifts that can range from fear to euphoria, with transitions so rapid that the user may seem to experience several emotions of relaxation (similar to effects of low doses of marijuana)Nervousness, paranoia, and panic reactionsIntrospective/spiritual experiences
I hope I could help ya