In a double-blind, placebo-controlled study of 40 people with asthma severe enough to require corticosteroid treatment, use of an injected homeopathic remedy consisting of Asclepias vincetoxicum and Sulphur significantly improved symptoms.¹ See also the discussion of allergic asthma in the article on allergies.

A double-blind, placebo-controlled study of 44 people with generalized anxiety disorder, found that use of constitutional homeopathy did not significantly improve symptoms.²

In a double-blind study of 62 children with attention deficit disorder, use of constitutional homeopathic remedies proved more effective than placebo.⁵ However, a similar study of 43 children, again using constitutional remedies, failed to find statistically significant benefits.⁶

A six-monthy double blind study failed to find constitutional homeopathy convincingly more effective than placebo for treatment of chronic fatigue syndrome.⁷ However, homeopathic consultation itself proved to have a dramatically beneficial effect, regardless of whether participants were subsequently given placebo or the actual prescribed homeopathic treatment.

In a small double-blind, placebo-controlled study, oral use of a low dilution homeopathic remedy containing potassium bromide, sodium bromide, nickel sulfate, and sodium chloride significantly improved symptoms of seborrheic dermatitis (including dandruff).³

A double-blind, placebo-controlled study evaluated the potential benefits of homeopathic thyroid hormone (30c) in weight loss.⁴ A total of 208 people were enrolled in the study. All study participants were undergoing a fast, and had reached a plateau where they were no longer rapidly losing weight. Use of homeopathic thyroid significantly enhanced the rate of weight loss.

A double-blind, placebo-controlled study conducted in Honduras failed to find a combination homeopathic remedy more effective than placebo for treatment of dengue fever.⁸