Metamucil also contains additional ingredients as well, not just psyllium. Below is a picture of the ingredients contained in one particular Metamucil product: So, while an allergic reaction to Metamucil is uncommon, it can't be ruled out. In regard to Lamictal, it can cause rashes and hypersensitivity reactions., Metamucil Drug Interactions Our pharmacist answers the latest question regarding whether or not Metamucil interacts with certain medications., JeremyP asked What is the difference between Miralax & Metamucil? Answer While both medications can be used for the same indication (constipation), they are fundamentally different products. What Is Metamucil? Metamucil is known as a fiber laxative. Specifically, it is a psyllium fiber. Psyllium fiber is useful for bulking up the stool (just as our bodies do naturally until we feel the need to , Miralax and Metamucil are not the same. Miralax contains Polyethylene glycol 3350. Metamucil is a bulk-forming laxative containing psyllium fiber., Metamucil Vs. Psyllium Fiber: What Is The Difference? In our latest question and answer, the pharmacist discusses whether or not Metamucil and psyllium fiber are the same., Tomar suplementos de fibra a diario parece ser seguro. Los suplementos de fibra más populares son la inulina, el psilio (Metamucil, Konsyl, otros) y la metilcelulosa (Citrucel). La fibra es buena para el organismo. Ayuda al buen funcionamiento del intestino y previene el estreñimiento. La fibra puede ayudar a reducir el colesterol y a sentirse saciado, lo que puede ayudar a controlar que .