Homeopathic remedies almost never go to FDA clinical trials. At most, they are subject to USDA purity standards, but that's not even required (you should look for that anyway!)

Check Google Scholar for scientific articles. You may need to try several queries to find anything, but if you're not finding anything within a half-dozen queries, you have your answer... You can also check PubMed, but Google Scholar will find articles within PubMed as well as more broadly.