Although minor compared to those of epinephrine, beta agonists usually have mild to moderate adverse effects, which include anxiety, hypertension, increased heart rate, and insomnia. Other side effects include headaches and essential tremor. Hypoglycemia was also reported due to increased secretion of insulin in the body from activation of β2 receptors. In 2013, zilpaterol, a β agonist sold by Merck, was temporarily withdrawn due to signs of sickness in some cattle that were fed the drug.
Beta-adrenergic agonist
Alpha-adrenergic agonist
Beta2-adrenergic agonist
Muscarinic antagonist
Dopamine agonist
Norepinephrine–dopamine disinhibitor
Adrenergic release inhibitor
Channel blocker