4-FA

=== Forms & Identification === 4-FA belongs to the fluorinated [[substance:amphetamine]] family, where [[glossary:positional-isomer|positional isomers]] ([[substance:2-fa]], [[substance:3-fa]]) have distinct pharmacological profiles but may produce similar reagent reactions. A positive result for "fluoroamphetamine" does not specify which [[glossary:isomer]] is present. [[glossary:mass-spectrometry]]-based drug checking services, where available, provide definitive identification. Because 4-FA's cardiovascular [[glossary:toxicity]] is dose-dependent and the [[glossary:controlled-study]]'s 150 mg arm was terminated for safety{{cite|doi=10.3389/fphar.2018.00713|anchor=c749f19c}}, accurate dosing is critical. Weigh doses with a milligram-precision scale rather than estimating by volume or appearance. === Set & Setting === 4-FA's experiential character shifts significantly with context{{cite|doi=10.1111/add.12932|anchor=c99aa899}}. In high-energy environments (clubs, festivals), the [[substance_class:psychoactive/stimulant]] drive dominates, which can mask [[glossary:awareness]] of cardiovascular strain — elevated [[glossary:heart-rate]] and [[glossary:blood-pressure]] may go unnoticed during [[glossary:physical-exertion]]. Social settings bring out the [[glossary:warmth|empathogenic warmth]]. Choosing a low-exertion, temperature-controlled environment with access to water reduces the cardiovascular burden that represents 4-FA's primary danger. {{Guideline}} ==== Guidelines ==== * Test the substance with [[glossary:reagent-kit|reagent kits]] and, where possible, a drug checking service to confirm identity and rule out substitution * Weigh doses with a milligram scale — do not estimate * Start at the low end of the [[glossary:dose-range]]; cardiovascular risk escalated sharply at 150 mg in the sole controlled study{{cite|doi=10.3389/fphar.2018.00713|anchor=3571cf81}} * Allow at least 2 hours before considering any [[glossary:redose]] — peak effects arrive 1–2 hours after [[glossary:ingestion]]{{cite|doi=10.1002/dta.2595|anchor=0ac26bfa}} * Stay hydrated but do not overhydrate — moderate, regular water intake * Avoid strenuous physical exertion during peak effects to reduce cardiovascular strain * Have a sober companion aware of the substance taken and its cardiovascular risk profile {{/Guideline}} {{Emergency}} ==== Emergency Response ==== '''Recognizing an emergency:''' [[glossary:chest-pain]] or tightness, severe [[effect:headache]] with sudden onset, [[glossary:seizure|seizures]], [[glossary:loss-of-consciousness]], or [[glossary:body-temperature]] hot to the touch through clothing. Given 4-FA's documented risk of [[glossary:stroke]] and heart complications, do not wait to see if these symptoms resolve. '''Immediate steps:''' * 1. Call emergency services immediately if any of the above signs appear * 2. Keep the person still and calm — physical exertion worsens cardiovascular strain * 3. Move to a cool environment if overheating * 4. If unconscious but breathing, place in the [[glossary:recovery-position]] (on their side, [[glossary:airway]] clear) * 5. Do not induce [[effect:vomiting]] * 6. Do not restrain unless there is immediate danger of [[glossary:self-harm]] '''What to tell the dispatcher:''' Name the substance (4-fluoroamphetamine / 4-FA), the estimated amount taken, the time of ingestion, and current symptoms. [[glossary:good-samaritan-law|Good Samaritan laws]] in many jurisdictions protect people who call for help during a [[glossary:drug-emergency]]. No reversal agent exists for 4-FA. Treatment is supportive — managing blood pressure, temperature, and cardiac symptoms. {{/Emergency}} {{Aftercare}} ==== Aftercare & Integration ==== The comedown from 4-FA commonly includes low mood, headache, [[effect:irritability]], and [[effect:cognitive-fatigue]] lasting 12–24 hours{{cite|doi=10.3389/fphar.2018.00713|anchor=cd856cd0}}. "[[effect:brain-zaps]]" and difficulty concentrating the following day are frequently reported{{cite|doi=10.1016/j.drugalcdep.2015.10.011|anchor=5a91f082}}. Prioritize sleep — the stimulant effects may delay sleep onset even after [[index:effects|subjective effects]] fade. Eat nutritious food, hydrate, and avoid additional stimulants (including [[substance:caffeine]]) during the recovery window. Physical and cognitive performance may be impaired the day after use; plan accordingly. If low mood persists beyond 48–72 hours, this may indicate significant [[glossary:depletion|monoamine depletion]] and warrants attention. {{/Aftercare}} {{Recovery}} ==== Recovery & Support ==== 4-FA's moderate [[glossary:psychological-dependence]] potential means that patterns of escalating use can develop, particularly among people drawn to its combination of stimulant productivity and social warmth. If use has become regular — weekly or more frequent — [[glossary:tolerance]] will have reduced the desired effects while cardiovascular risk remains unchanged or increases. Reducing frequency gradually is preferable to abrupt cessation, though physical [[glossary:withdrawal]] is minimal. If 4-FA use has become entangled with social or occupational functioning, professional support through a [[glossary:substance-use]] counselor or [[glossary:peer-support]] group can help establish alternative patterns. {{/Recovery}}

=== Forms & Identification === 4-FA belongs to the fluorinated [[substance:amphetamine]] family. [[glossary:positional-isomer|Positional isomers]] ([[substance:2-fa]], [[substance:3-fa]]) have distinct pharmacological profiles but may produce similar reagent reactions — a positive result for "fluoroamphetamine" does not confirm which [[glossary:isomer]] is present. [[glossary:mass-spectrometry]]-based drug checking services provide definitive identification. Because 4-FA's cardiovascular [[glossary:toxicity]] is dose-dependent and the [[glossary:controlled-study]]'s 150 mg arm was terminated for safety{{cite|doi=10.3389/fphar.2018.00713|anchor=539b2313}}, accurate dosing is critical. Weigh doses with a milligram-precision scale rather than estimating by volume or appearance. === Set & Setting === 4-FA's experiential character shifts significantly with context{{cite|doi=10.1111/add.12932|anchor=f6762e80}}. In high-energy environments, the [[substance_class:psychoactive/stimulant]] drive dominates — elevated [[glossary:heart-rate]] and [[glossary:blood-pressure]] may go unnoticed during [[glossary:physical-exertion]]. A low-exertion, temperature-controlled environment with access to water reduces the cardiovascular burden that represents 4-FA's primary danger. {{Guideline}} ==== Guidelines ==== * Test the substance with [[glossary:reagent-kit|reagent kits]] and, where possible, a drug checking service to confirm identity and rule out substitution * Weigh doses with a milligram scale — do not estimate * Start at the low end of the [[glossary:dose-range]]; cardiovascular risk escalated sharply at 150 mg in the sole controlled study{{cite|doi=10.3389/fphar.2018.00713|anchor=acef645b}} * Allow at least 2 hours before considering any [[glossary:redose]] — peak effects arrive 1–2 hours after [[glossary:ingestion]]{{cite|doi=10.1002/dta.2595|anchor=c95fd6fc}} * Stay hydrated but do not overhydrate — moderate, regular water intake * Avoid strenuous physical exertion during peak effects to reduce cardiovascular strain * Have a sober companion aware of the substance taken and its cardiovascular risk profile {{/Guideline}} {{Emergency}} ==== Emergency Response ==== '''Recognizing an emergency:''' [[glossary:chest-pain]] or tightness, severe [[effect:headache]] with sudden onset, [[glossary:seizure|seizures]], [[glossary:loss-of-consciousness]], or [[glossary:body-temperature]] hot to the touch through clothing. Given 4-FA's documented risk of [[glossary:stroke]] and heart complications, do not wait to see if these symptoms resolve. '''Immediate steps:''' * 1. Call emergency services immediately if any of the above signs appear * 2. Keep the person still and calm — physical exertion worsens cardiovascular strain * 3. Move to a cool environment if overheating * 4. If unconscious but breathing, place in the [[glossary:recovery-position]] (on their side, [[glossary:airway]] clear) * 5. Do not induce [[effect:vomiting]] * 6. Do not restrain unless there is immediate danger of [[glossary:self-harm]] '''What to tell the dispatcher:''' Name the substance (4-fluoroamphetamine / 4-FA), the estimated amount taken, the time of ingestion, and current symptoms. [[glossary:good-samaritan-law|Good Samaritan laws]] in many jurisdictions protect people who call for help during a [[glossary:drug-emergency]]. No reversal agent exists for 4-FA. Treatment is supportive — managing blood pressure, temperature, and cardiac symptoms. {{/Emergency}} {{Aftercare}} ==== Aftercare & Integration ==== The comedown from 4-FA commonly includes low mood, headache, [[effect:irritability]], and [[effect:cognitive-fatigue]] lasting 12–24 hours{{cite|doi=10.3389/fphar.2018.00713|anchor=f0630236}}. "[[effect:brain-zaps]]" and difficulty concentrating the following day are frequently reported{{cite|doi=10.1016/j.drugalcdep.2015.10.011|anchor=0c7b4626}}. Prioritize sleep — the stimulant effects may delay sleep onset even after [[index:effects|subjective effects]] fade. Eat nutritious food, hydrate, and avoid additional stimulants (including [[substance:caffeine]]) during the recovery window. Physical and cognitive performance may be impaired the day after use; plan accordingly. If low mood persists beyond 48–72 hours, this may indicate significant [[glossary:depletion|monoamine depletion]] and warrants attention. {{/Aftercare}} {{Recovery}} ==== Recovery & Support ==== 4-FA's moderate [[glossary:psychological-dependence]] potential means patterns of escalating use can develop, particularly among people drawn to its combination of stimulant productivity and social [[glossary:warmth]]. If use has become regular — weekly or more frequent — [[glossary:tolerance]] will have reduced desired effects while cardiovascular risk remains unchanged or increases. Reducing frequency gradually is preferable to abrupt cessation, though physical [[glossary:withdrawal]] is minimal. If 4-FA use has become entangled with social or occupational functioning, professional support through a [[glossary:substance-use]] counselor or [[glossary:peer-support]] group can help establish alternative patterns. {{/Recovery}}