lactulose 667 MG/ML Oral Solution [Constulose]

What the CMS Formulary Data Shows for lactulose 667 MG/ML Oral Solution [Constulose]

Per the CMS 2026 Part D formulary file, lactulose 667 MG/ML Oral Solution [Constulose] (RxNorm concept RXCUI 544452, generic name lactulose) appears on 325 distinct formulary files spanning 4,937 Medicare Part D plan offerings - 97.4% of enrollable Part D products, near-universal placement. Tier placement ranges from Tier 1 to Tier 4, with a cross-plan average of Tier 1.8.

Real-world access to lactulose 667 MG/ML Oral Solution [Constulose] depends on utilization management as much as tier placement: 0% of covering formularies require prior authorization. 0% require step therapy. 0% apply quantity limits.

Historical spending context from the CMS Medicare Part D Drug Spending Dashboard shows 526,962 Part D beneficiaries filled lactulose 667 MG/ML Oral Solution [Constulose] in 2023, with total plan-and-beneficiary spending of $72,482,220 and an average per-beneficiary annual cost of $137.55. The plan-by-plan detail below lists exactly which PDP and MA-PD contracts carry lactulose 667 MG/ML Oral Solution [Constulose] today.