The care by design is 18mg of CBD in 1 ml. 18:1. I initially started with Treatwell but they went out of business. Then I switched to Sweet Jayne, then Myriam's hope. It is a lot of trial and error. Now I have been using Care by Design since it seems to work a little better than the others. If you find a reputable marijuana dispensary with people who have treated others with autism and/or anxiety they can give you very valuable information. Also Radicle health clinic which was worth paying privately for consultation, was very helpful.
I initially started my son with a very small dose 0.25ml which had little effect, then went to 0.5 ml and now he recently started taking 0.7 ml every 4 to 5 hours. I also have his care staff take daily data on some of his target behaviors which indicate anxiety for him eg. yelling, hitting, rubbing hands together repeatedly, pleasant, more cooperative etc, You can look at the ATEC Autism Treatment Evaluation Checklist on the ARI website and there are other behavioral checklists that can be adapted for an individualized treatment evaluation form. Taking quantifiable data I find is important because then you have an idea of what is happening daily, how the person is before the CBD and after. INMHO, data taking or at least journaling is important to determine the efficacy of psychiatric medications.
For my son CBD seems to start taking effect after about 45 minutes. Hope this information is helpful There are other websites on CBD and autism which I have to explore. I am not an expert yet so please do not take what I wrote above as a recommendation.. I am just sharing my experience. . I am a RN with a masters degree and may take an intensive course in CBD/medicinal marijuana to further help my son and others.