Ivermectin treats scabies at 200 mcg/kg — but one dose only achieves 58% cure vs 98% with two doses 14 days apart. This 2026 CDC-based guide covers why ivermectin must be taken with food for scabies, the crusted scabies intensive protocol, weight-based dosing table, environmental decontamination steps, simultaneous household contact treatment, and why itching continues after successful treatment.

Asthma affects 29 million Americans in 2026 — but over half with moderate-severe disease have uncontrolled symptoms. This guide covers all asthma types, GINA 2026 stepwise treatment, ICS-formoterol as the new reliever standard, a 10-inhaler comparison table, a 12-trigger avoidance table, and all Step 5 biologics including tezepelumab.

Psoriasis affects 8 million Americans — 30% develop psoriatic arthritis. This 2026 guide covers all 5 types, the IL-17/IL-23 immune mechanism, common triggers including the Koebner phenomenon, a full 11-treatment comparison table, medications that worsen psoriasis, and the link to depression, cardiovascular disease, and hair loss.