Mucinex D tablets are extended release so they should work well over 12 hours. They may not be as effective if you take 1 tablet every 6 hours, but I guess there is no harm in taking it this way. Just do not exceed 4 tablets in 24 hours.
- Mucinex D Information for Consumers
- Mucinex D Information for Healthcare Professionals (includes dosage details)
- Side Effects of Mucinex D (detailed)
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