Clenbuterol Hydrochloride

Respiratory

A bronchodilator and uterine relaxant, an agonist at beta-2 adrenergic receptors. It stimulates these receptors in bronchial smooth muscle, relaxing it and widening the airway, and it has a uterine-relaxant (tocolytic) effect. It is used particularly in horses.

Calculate dose Calculate withdrawal

Drug class

Respiratory

Registered species

Recorded effects

Pharmacological information

A class-level scientific overview for general reference — no doses. The ultimate reference is always the locally approved product leaflet and consultation with a veterinarian.

Mechanism of action

Indications

Respiratory diseases accompanied by bronchoconstriction in horses
Uterine relaxation in certain obstetric situations

Contraindications & warnings

Not to be used in food-producing animals for fattening — prohibited as a growth promoter
Heart disease and tachycardia

Drug interactions

Its effect is antagonized by beta-adrenergic blockers
Its cardiac effects may be aggravated with other sympathomimetic drugs

Human-safety warning

Human hazard: it is illicitly misused as a growth promoter, and its residues in meat may cause poisoning (tachycardia and tremor). The prohibition on its use in the food chain is observed.

Sources: European Medicines Agency (EMA) — Veterinary medicines·Merck Veterinary Manual — Pharmacology

Withdrawal periods

Note: Source: UK Veterinary Medicines Directorate (VMD). The figures are a guidance reference that may differ from the product registered in your country — always verify the locally approved leaflet and consult a veterinarian before slaughter or consuming products.

Ventipulmin Granules 16 micrograms/gram

Granules · Boehringer Ingelheim Animal Health UK Limited

SPC leaflet ↗