Homeopathic remedies are not the same as herbal or natural remedies. Homeopathic remedies are highly diluted substances that follow the principle of "like cures like," whereas herbal or natural remedies use whole or parts of plants, minerals, or other natural substances for their medicinal properties.

Source

Using homeopathy alongside conventional medicine is considered safe. In my practice I've never seen any adverse events when using homeopathy along side conventional medicine. But, as always, it is important to coordinate your concerns with qualified healthcare professionals.

Source

In my practice I've seen some clients achieve almost immediate change while others take time. 
Homeopathy's efficacy and the speed at which it may work can vary widely depending on the individual, the condition being treated, and the specific remedy used. There is no definitive timeframe for when homeopathic remedies may take effect.

Source

Homeopathy is generally considered safe when used as directed and under the supervision of a qualified practitioner. The extremely high dilutions used in homeopathic remedies mean that they typically have few, if any, side effects. 

Source

Homeopathy is based on the principle of "like cures like" and involves using highly diluted substances that, in larger doses, would produce symptoms similar to those being treated. It is believed to stimulate the body's self-healing mechanisms.

Source