State laws that require the pharmacist to “dispense as written.” The effect is to prohibit a pharmacist from substituting a different brand name drug for the one prescribed, or from substituting a generic equivalent drug in place of a drug prescribed b}’ brand name, even if the drug that would be substituted is considered to be therapeutically equivalent to the drug prescribed and perhaps is less expensive. Drug reimbursement programs such as the Maximum Allowable Cost Program, which will limit reimbursement to the lowest cost at which a drug is generally available, will be more effective if the}’ override anti-substitution laws.