Mich. Comp. Laws § 691.1612

Sec. 12. Except as otherwise provided in this section, a cause of action accrues under this act when a person who may recover has reason to know of the harm from use of an illegally marketed controlled substance that is the basis for the cause of action and has reason to know that the controlled substance use is the cause of the harm. For a plaintiff, the statute of limitations under this section is tolled while the individual potential plaintiff is incapacitated by the use of an illegally marketed controlled substance to the extent that the individual cannot reasonably be expected to seek recovery under this act or as otherwise provided by law.