Charcoal

The purpose of each study is to independently measure the annualized relapse rate (ARR) with administration of frexalimab compared to a daily oral dose of teriflunomide in male and female participants with relapsing forms of multiple sclerosis (aged 18 to 55 years at the time of enrollment). People diagnosed with relapsing forms of multiple sclerosis are eligible for enrollment as long as they meet all the inclusion criteria and none of the exclusion criteria.
Study details include:
* This event-driven study will have variable duration of approximately 40 months for the first participant being randomized and approximately 20 months for the last participant randomized.
* The study intervention duration will vary ranging from approximately 12 to 40 months.
* The assessment of scheduled visits will include 1 common end of study [EOS] visit and 3 follow-up visits) with a visit frequency of every 4 weeks for the first 6 months and then every 3 months.

Activated charcoal (AC) is an established, effective means of gastrointestinal decontamination. Providers give it to patients who have ingested something that is thought to be potentially poisonous to prevent it from being absorbed. However, one limitation to its use is palatability of the AC for the patient, potentially limiting how much, if any, is taken.
Other studies have suggested that mixing AC with various substances improves the rating on various scales (taste, etc). An important question is whether mixing the AC with other substance effects the ability of the AC to bind to xenobiotic in the gut. This small study investigates whether mixed cola with charcoal affected its ability to prevent the absorption of acetaminophen. It also performs a survery to see if participants preferred the AC-cola mixture. The investigators hypothesize that the AC will be equally as effective with cola as without. The investigators also hypothesize that participants will prefer the AC-cola mixture.