Performance & Grey-Market Pharma
Ketotifen (Zaditor/Astafen)
Street names: Zaditor, Astafen, Ketasma
Overdose? Act now. Call emergency services — say "unresponsive, not breathing". Give naloxone for opioid-like signs. Hotlines
⚡What it does
- Antihistamine with mast-cell stabilizing effect
- Bodybuilding use: paired with clenbuterol to keep beta-receptors responsive
⚠Key risks
- Drowsiness (the main side)
- Weight gain on longer use
- The 'ketotifen + clen' stack adds antihistamine sedation to stimulant load — poor combination for heart/alertness
✚Overdose signs
- Sedation, confusion
- Racing heart when stacked with stimulants
📋Quick facts
Also known asZaditor, Astafen, Ketasma
CategoryPerformance & Grey-Market Pharma
Schedule / classOTC eye drops (US); Rx tablet elsewhere
Appearance1 mg tablets; 0.025% eye drops
Street price~$0.10–$0.50 per tablet
Legal statusOTC/Rx varies; cheap and rarely faked
Last updated2026-09-16
Sources: FDA, EMA
Category comparison — Performance & Grey-Market Pharma
| Substance | Class | Top risks | Street price |
|---|---|---|---|
| Ketotifen (Zaditor/Astafen) | OTC eye drops | Drowsiness (the main side); Weight gain on longer use | ~$0.10–$0.50 per tablet |
| Clenbuterol HCl | Not approved for human use | Racing heart, arrhythmia, tremors; Overdose: dangerous potassium shifts, cardiac events | ~$0.50–$2 per 40 mcg tablet |
| Salbutamol (Albuterol/Ventolin) | Rx-only | Tremor, racing heart at high doses; Potassium drop (hypokalemia) — dangerous with cardiac conditions | ~$5–$20 per inhaler grey-market |
Street prices are regional estimates. Potency and cuts vary constantly.
RxBrand names on the grey market
These brands are sold as this compound. Same molecule, different label and supply chain — quality varies enormously between them.
KetasmaAsthafen
?Frequently asked questions
What does Ketotifen (Zaditor/Astafen) look like?
1 mg tablets; 0.025% eye drops
What are the signs of a Ketotifen (Zaditor/Astafen) overdose?
Sedation, confusion; Racing heart when stacked with stimulants Call emergency services immediately.
How addictive is it?
Drowsiness (the main side) Dependence can develop with regular use.
🔗Sources & further reading
Facts on this page are compiled from these primary sources. External links open in a new tab.