Nicotine & Caffeine
Comprehensive Substance Reference & Harm Reduction Guide
Nicotine & Caffeine
GUIDE-WIDE SAFETY NOTICE: This guide is for recognition, harm-reduction, and emergency-reference purposes. Appearance alone cannot reliably identify a substance. Counterfeit pills, powders, vapes, edibles, and street mixtures may contain unexpected drugs. Do not taste, smell closely, burn, or handle an unknown substance to identify it. If poisoning is possible, contact Poison Control (U.S. 1-800-222-1222) or 911 for severe symptoms.
10. Nicotine & Caffeine
| Substance | Appearance, Route & Intoxication | Physical Side Effects | Severe Toxicity / Overdose & Response |
| Tobacco & Vapes / E-Liquids | Cigarettes, cigars, chew, vapes, nicotine pouches/gum. Smoked, oral, vaped. Stimulation, fast heart rate. | Increased heart rate/BP, nausea/dizziness in new users, throat irritation, cough. | Overdose: Severe vomiting, sweating, tremor, seizures, arrhythmias, weakness, breathing failure. Response: Remove exposure, wash skin if liquid contact. Poison Control for poisoning; 911 for seizures, collapse, breathing problems. |
| Caffeine (Beverages, Pills, Powder) | Coffee, energy drinks, tablets, pure powder. Oral. Alertness, jitteriness, anxiety, tremor, insomnia. | Jitters, tremor, increased heart rate, urination, stomach reflux, headache. | Overdose: Marked palpitations, vomiting, severe agitation, dangerous arrhythmias, seizures, death. Response: Stop caffeine. Poison Control for concerning excess; 911 for seizures, severe chest pain, or collapse. |