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Table 1 The 51 categorized topics and the four overarching themes characterizing the discussions

From: Harm reduction and knowledge exchange—a qualitative analysis of drug-related Internet discussion forums

Themes Topics
Uncovering the substance facts Brands
Service
Contraindications
Content speculation
Batches
Vendors
Reviews and evaluations
Acquisition
Specific substances
Availability
Toxicity
Quality
Legal status
Price
Tolerance and cross-tolerance
Pharmacology
Comparing substances
Dosage and administration Supplements
Purpose and intention
Combinations
Administration
Expectations
Settings
Mood and state
Dosage
Do it yourself
Recreation
Subjectively experienced effects Initial effects
Aftereffects
Side effects
Positive effects
Physiological
Emotional
Cognitive
Duration
Potency
Evaluating effects
Experiences
Insight
Comparing effects
Support and safety Coping
Harm reduction
Caution
Acute help
Risks
Warnings
Recovery reports
Addiction
Support
  Advice