ketotifen's effects on reducing receptor burn out from clenbuterol/albuterol is kind of over blown. It really won't make that much of a difference. The best thing you can do is simply take time off. Our adrenals glands are constantly being fired with our go go go high stress lifestyles. Most people in our current society suffer from adrenal fatigue.
I really recommend everyone read this book on adrenal fatigue:
https://adrenalfatigue.org/product/...ry-stress-syndrome-book-by-dr-james-l-wilson/
That is why I recommend people use the non-stimulant stack of cardarine gw + n2slin from n2bm.com as a cutting/weight loss stack instead of clenbuterol, stimulants etc.
https://www.needtobuildmuscle.com/store/Need2Slin-p50.html
Cardarine (GW-501516) - the best GW-50 - Evolutionary.org
Cardarine is drug that binds to the PPAR receptor and is non-hormonal. Cardarine increases the expression of genes involved in the expenditure of energy, stimulates glucose uptake in skeletal muscle tissue and burns fat by stimulating fatty acid oxidation.
N2slin is a non-stimulant fat burner and powerful nutrient partitioner. It increases insulin sensitivity of muscle cells and helps partition the food you eat into muscle cells and away from fat cells.
Take 20mg of cardarine gw per day. 10mg AM 10mg PM
Take 2 tablets N2slin 30 minutes before each meal you eat that contains a significant amount of carbohydrates.
Both are stimulant free and non-hormonal. You need to be careful with all these stimulant based fat burners. Overdoing it on the stimulants will greatly increase cortisol levels and lead to adrenal fatigue. Counterproductive to any fat loss or muscle building goals.