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Microenvironmental pH values of the polymeric patch formulations containing THC-HG (5 % w/w).
| Patch Formulation | % pH modifier | pH |
|---|---|---|
| PEO N-80 | 0 | 6.7 |
| PEO-citric acid | 0.5 | 3.8 |
| PEO-citric acid | 2.5 | 3.4 |
| PEO-tartaric acid | 2.5 | 4.2 |
| PEO-fumaric acid | 2.5 | 4.5 |
| PEO-succinic acid | 2.5 | 4.7 |
| PEO-monobasic sodium phosphate | 2.5 | 5.4 |
| PEO-sodium tartarate | 0.5 | 5.8 |
| PEO- sodium tartarate | 2.5 | 6.0 |
| PEO- sodium citrate | 0.5 | 6.3 |
| PEO- sodium citrate | 2.5 | 6.9 |
