Weight Loss & Metabolic Meds
Levothyroxine (T4)
Street names: T4, Synthroid, Eltroxin, Levoxyl
Overdose? Act now. Call emergency services — say "unresponsive, not breathing". Give naloxone for opioid-like signs. Hotlines
⚡What it does
- Standard hypothyroidism replacement — normalizes metabolism
- Abuse: mild metabolic boost (must convert to T3 in the body, so weaker than T3 direct)
⚠Key risks
- Overtreatment = hyperthyroid state: palpitations, anxiety, bone loss
- Taking it without hypothyroidism provides little benefit at real risk
- Interaction city — absorbs wrong with coffee, calcium, iron
✚Overdose signs
- Racing heart, tremor, heat intolerance
- Chest pain — emergency
📋Quick facts
Also known asT4, Synthroid, Eltroxin, Levoxyl
CategoryWeight Loss & Metabolic Meds
Schedule / classRx-only — not controlled
Appearance25–300 mcg tablets by many manufacturers
Street price~$0.10–$0.50 per tablet (cheap generic)
Legal statusRx-only; the world's most-prescribed hormone
Last updated2026-09-16
Sources: FDA, EMA
Category comparison — Weight Loss & Metabolic Meds
| Substance | Class | Top risks | Street price |
|---|---|---|---|
| Levothyroxine (T4) | Rx-only — not controlled | Overtreatment = hyperthyroid state: palpitations, anxiety, bone loss; Taking it without hypothyroidism provides little benefit at real risk | ~$0.10–$0.50 per tablet |
| Liothyronine (T3) | Rx-only — not controlled | At abuse doses: cardiac arrhythmia, heart failure, bone loss; Muscle catabolism — the 'cut' comes with your muscle | ~$0.50–$2 per tablet 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.
T4Eltroxin (T4)Synthroid T4ThyroxThyronormL-Thyroxin
?Frequently asked questions
What does Levothyroxine (T4) look like?
25–300 mcg tablets by many manufacturers
What are the signs of a Levothyroxine (T4) overdose?
Racing heart, tremor, heat intolerance; Chest pain — emergency Call emergency services immediately.
How addictive is it?
Overtreatment = hyperthyroid state: palpitations, anxiety, bone loss 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.