Clenbuterol 40Mg Clenbuterol tablets are typically sold in 20 mcg dosages, but occasionally you will see some brands that are packaged in 40 mcg increments. These pills tend to be used more in the veterinary industry as bronchodilators and asthma treatments for large animals such as horses. The 40 mcg Clenbuterol tablets are less popular among bodybuilders and people who want to lose weight since they do not offer the same flexibility when designing a cycle schedule for your dosages. Most users prefer to increase their dose by 20 mcg increments every couple of days to prevent side effects and allow the supplement to gain effectiveness over time.