Hyperthyroidism is, so I am told, a frequent veterinary problem, particularly in elderly cats. Homeopathic treatment is sometimes used to treat this condition. One article even provided encouraging details based on 4 case-reports. All 4 cats showed resolution of clinical signs; three attained normal thyroid hormone levels. The authors concluded that homeopathic and complementary therapies avoid the potential side effects of methimazole and surgical thyroidectomy, they are less costly than radioactive iodine treatment, and they provide an option for clients who decline conventional therapies.
Yes, you guessed correctly: such a paper can only be published in the journal ‘HOMEOPATHY‘, respectable journals would not allow such conclusions based on 4 case-reports. They don’t permit inferences as to cause and effect. We have no idea what would have happened to these animals without homeopathy – perhaps they would have fared even better!
What we need is a proper controlled trial. The good news is that such a study has just been published. This double-blinded, placebo-controlled randomised trial was aimed at testing the efficacy of individualised homeopathy in the treatment of feline hyperthyroidism. Cats were randomised into two treatment arms. Either a placebo or a homeopathic treatment was given to each cat blindly.
After 21 days, the T4 levels, weight (Wt) and heart rate (HR) were compared with pre-treatment values. There were no statistically significant differences in the changes seen between the two treatment arms following placebo or homeopathic treatment, or between the means of each parameter for either treatment arm before and after placebo or homeopathic treatment. In a second phase of the study, patients in both treatment arms were given methimazole treatment for 21 days and T4, Wt and HR determined again. Subsequently, statistically significant reductions were noted in T4 (P<0.0001) and HR (P=0.02), and a statistically significant increase was observed in Wt (P=0.004).
The authors concluded that the results of this study failed to provide any evidence of the efficacy of homeopathic treatment of feline hyperthyroidism.
So, homeopathy does not work – not in humans nor in animals. This statement, backed by solid facts, proves all those wrong who cannot resist uttering the notion that HOMEOPATHY CANNOT BE A PLACEBO BECAUSE IT WORKS IN ANIMALS.
And we have seen the evidence for the correctness of this fact so often (for instance here, here, here and here) that I feel embarrassed to say it again: highly diluted homeopathic remedies are placebos. As soon as we adequately control for placebo and other non-specific effects in properly controlled studies, the alleged effects, reported in anecdotes and other uncontrolled studies, simply disappear.