Positives

• A patient who reacted to standard levothyroxine fillers felt better on compounded T4 in hypoallergenic cellulose, free of gluten, lactose, and dyes Dr. Izabella Wentz.
  
  
• In a survey of nearly 1,000 levothyroxine users, 15% reported allergies to common excipients and benefited from a custom-compounded T4 formulation Hypothyroid Mom.
  
  

Negatives

• A patient noticed binder sensitivities still produced GI issues and reduced absorption depending on which excipient the compounding pharmacy chose Paloma Health.
  
  
• A user reported potency variability between refills of compounded T4 unless the pharmacy was an experienced specialty compounder Harbor Compounding.
  
  

Hurdles & Side Effects

• Patients seeking compounded T4 reported insurance denials and difficulty finding a reputable compounding pharmacy nearby, even though out-of-pocket costs remained relatively affordable Amy Myers MD.