Homeopathic medicines, because they are diluted, generally do not have side effects. However, some people report feeling worse briefly after starting a homeopathic remedy. Homeopaths interpret this as the body temporarily stimulating symptoms while it makes an effort to restore health. In people who have serious illnesses, these temporary aggravations of symptoms can be very harmful. If you have a serious physical or mental illness, you should only use homeopathy under the guidance of a trained practitioner and inform everyone on your health care team about any homeopathic medicines you are taking.
Homeopathic medicines that are sufficiently diluted are not known to interfere with conventional drugs, however, if you are currently taking prescription medicines you should consult your doctor if you are considering using homeopathic remedies.