Metamucil (Psyllium) Daily Dosing
For generally healthy adults, Metamucil can be taken up to 3 times daily, with each dose consisting of one packet (approximately 3.4 grams of psyllium) mixed with at least 8 ounces of water, for a maximum total daily dose of approximately 10 grams of psyllium. 1
Standard Dosing Regimen
- Starting dose: Begin with 1 dose per day (one packet in 8 oz of liquid) at the first sign of irregularity 1
- Titration: Gradually increase to up to 3 doses per day as necessary, allowing your body to adjust to increased fiber intake 1
- Maximum frequency: Up to 3 times daily for adults 12 years and older 1
- Preparation: Mix each dose with at least 8 ounces of water or other fluid, stir briskly, and drink promptly; if mixture thickens, add more liquid 1
Important Clinical Considerations
Expected Adjustment Period
- As your body adjusts to increased fiber intake, you may experience changes in bowel habits or minor bloating 1
- The median daily dose taken in real-world use is typically 1 dose per day, suggesting most users find this adequate 2
Critical Contraindication for Constipation Management
- Supplemental medicinal fiber such as psyllium is ineffective and may actually worsen constipation in patients taking opioids 3
- For opioid-induced constipation specifically, stimulant laxatives or polyethylene glycol are recommended instead, not psyllium 3
Hydration Requirements
- Adequate fluid intake must be maintained with each dose to prevent esophageal or intestinal obstruction 1
- Use more water for a lighter flavor and thinner consistency 1
Adherence and Effectiveness
- Patient satisfaction and adherence are significantly associated with proper instruction on use, including explanation of benefits and correct preparation 2
- 73% of users report they would continue using the product when properly counseled 2
- Long-term use is well tolerated 4