Other conditions commonly complicated by gout include lead poisoning, kidney failure, hemolytic anemia, psoriasis, solid organ transplants, and myeloproliferative disorders such as polycythemia. A body mass index greater than or equal to 35 increases male risk of gout threefold. Chronic lead exposure and lead-contaminated alcohol are risk factors for gout due to the harmful effect of lead on kidney function. Medication
Diuretics have been associated with attacks of gout, but a low dose of hydrochlorothiazide does not seem to increase risk. Other medications that increase the risk include niacin, aspirin (acetylsalicylic acid), ACE inhibitors, angiotensin receptor blockers, beta blockers, ritonavir, and pyrazinamide. The immunosuppressive drugs ciclosporin and tacrolimus are also associated with gout, the former more so when used in combination with hydrochlorothiazide. Hyperuricemia may be induced by excessive use of Vitamin D supplements. Levels of serum uric acid have been positively associated with 25(OH) D. The incidence of hyperuricemia increased 9.4% for every 10 nmol/L increase in 25(OH) D (P < 0.001). Pathophysiology
Gout is a disorder of purine metabolism, and occurs when its final metabolite, uric acid, crystallizes in the form of monosodium urate, precipitating and forming deposits (tophi) in joints, on tendons, and in the surrounding tissues. Microscopic tophi may be walled off by a ring of proteins, which blocks interaction of the crystals with cells and therefore avoids inflammation. Naked crystals may break out of walled-off tophi due to minor physical damage to the joint, medical or surgical stress, or rapid changes in uric acid levels.
Galactorrhea can also be caused by antipsychotics that cause hyperprolactinemia by blocking dopamine receptors responsible for control of prolactin release. Of these, risperidone is the most notorious for causing this complication. Case reports suggest proton-pump inhibitors have been shown to cause galactorrhea. Neonatal milk
Neonatal milk or witchs milk is milk secreted from the breasts of approximately 5% of newborn infants. It is considered a normal variation and no treatment or testing is necessary. In folklore, witchs milk was believed to be a source of nourishment for witches familiar spirits. See also
Lactation failure
Galactagogue
Mammoplasia
Hypothalamic–pituitary–prolactin axis

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