Summary
A synthetic opioid used as an analgesic. It is only used IM and IV in the medical field and has respiratory depressant effects. It is pregnancy category C and schedule IV in the US.
Dose Information
| ROA | Light | Common | Strong | Heavy |
|---|---|---|---|---|
| Intramuscular | 10-20mg | 20mg-30mg | 30-60mg | 60mg+ |
| Intravenous | 5-10mg | 10-20mg | 30mg | 30mg+ |
Light
Common
Strong
Heavy
Onset, Duration & After-effects
| ROA | Onset | Peak | After Effects |
|---|---|---|---|
| Intramuscular | 15-20 min | 2.0-3.0 hrs | 1.0-12.0 hrs |
| Intravenous | 2-3 min | 2.0-3.0 hrs | 1.0-12.0 hrs |
Tolerance
Build-up
develops within days of regular use; analgesic tolerance faster than respiratory depression tolerance
Reset
7–14 days for partial reset; full reset may take weeks — tolerance loss greatly increases overdose risk
Effects
Positive
- Stimulation
- Physical euphoria
- Muscle relaxation
Negative
- Motor impairment
- Increased heart rate
- Nausea
- Vasoconstriction
- Respiratory depression
- Teeth grinding
- Sedation
Positive
- Reduced anxiety
- Cognitive euphoria
- Euphoria
- Anxiety suppression
- Wakefulness
Negative
- Anxiety
- Compulsive redosing
- Dizziness
- Thought deceleration
- Time distortion
Positive
- Increased music appreciation
- Increased libido
- Tactile enhancement
- Color enhancement
Negative
- Disinhibition
- Appetite suppression
- Dehydration
- Light sensitivity
- Double vision
- Dulled perception