It is a Beta-2 adrenergic agonist. Clenbuterol is used at 60-120 mcgs per day, divided throughout the day. One Dollar or more per tab. Cycles Cycles usually last 6-12 weeks. After 2 weeks, the Beta-2 receptors down regulate and impairment of T4 to T3 conversion is impaired.
Research shows that using it for two days on then two days off prevents attenuation.
Apparently, clen has a half-life in the body of 48 hours making it pretty much irrelevant when you take it. This means that two days on, two days off, conserves the number of pills you use in a cycle rather than for receptor downgrade which occurs around two weeks. Cytomel fights the deiodinase impairment. On a clen cycle, a potassium supplement helps maintain your electrolyte status and reduces problems with muscle cramping. Nervousness, tremors of the hands, headaches, early onset asthma and insomnia.