angioedema
"I've been taking Danazol for Hereditary Angioedema (HAE) since Winstrol was discontinued. The medication works beautifully to reduce the frequency and severity of attacks, but the side effects are immediately evident (After my second dose, I remember telling my family that this drug is going to kill me before the HAE does). 

Long term side effects have included: brain fog, severe memory problems, severe cognitive decline (especially in language processing), tiredness, weight gain (40 lbs., so far) and mild masculinization. I haven't had a period in more than 5 years. This cocktail of side effects has taken me from an aggressive and quick-tempered type A to a laid back, very relaxed couch potato. That's great for my family, but not so great for work."