I personally do not like to do Botox and any procedures that cause swelling on the same day as the swelling can cause 'drift' of the Botox to areas on the face never intended to be treated. Please do the Botox first, wait at least 24 hours and then proceed with the next treatment.
You definitely can have Botox and HALO treatments a day apart and I routinely do it the same day. Botox is injected under the skin and the HALO laser treats the skin. Best wishes.Cody Koch