Look at these quotes from earlier in this thread from users that didn't have such a good experience. I didn’t realize this before, but now after doing more research I can see that these breathing effects are likely caused by the eucalyptol present in the extract:
A way to get rid of the eucalyptol must be found.
It looks like what obliguhl has is very high in eucalyptol, while what imPsimon has contains much less, but enough to feel it. SWIM's contains some for sure. It can be smelled, but it's not enough to be active at the doses SWIM has used.
These are the common side effects of eucalyptol:
Stomach pain, vomiting, dizziness, bleeding, difficulty breathing, cough, sleepiness, low blood sugar, skin rash and burning, slurred speech, headache, abnormal heartbeat, low blood pressure, circulation problems, slowing of brain functions and reflexes, seizures, multi-organ failure, coma, death.