When using it for fat loss. the primary effect of the drug, it seems to ;vork well for approximately 4-6 weeks. During this period. users will want to constantly monitor their body temperature. We are assured clenbuterol is working by the temperature elevation. Once the temperature drops back to normal, clenbuterol is no longer exhibiting a thermogenic effect. At this point increasing the dosage would not be very effective, and a break for at least a few weeks should be taken before it is used again effectively. If one is looking for strength gains, clenbuterol appears to be effective for a much shorter period of time, around 3-4 weeks. This may be due to an absence of real anabolic effect, with the strength gain seen with clenbuterol possibly due only to the stimulant properties of the drug (similar to the strength boost seen by Ephedrine users). Again however, this is still debated.ยด