What are the differences between LA (long acting), QA (quick acting) and OTC (over the counter)?
LA stands for ‘long acting’ (other abbrev.: SR, ER, XR, or XL) LA guai is made to dissolve slowly, over a 12 hour period. QA stands for quick acting (pharmacology: regular release). QA provides for an immediate release of all the medication. OTC stands for ‘over the counter’ and means that it can be purchased without a prescription. Most, but not all QA is OTC. In some countries LA is OTC and does not require a prescription to be purchased. Check with a pharmacist/chemist in your country to determine guai LA or QA availability and see the guai sources page. NOTE: Since Mucinex acquired a patent for their LA Guai the availability of LA guai has been compromised.
