Thank-you. So I am assuming that Potaba is p-Aminobenzoic Acid Potassium Salt just labeled and put in a pretty container.
I contacted a company in the US that will ship 1000grams of p-Aminobenzoic Acid Potassium Salt for $175. $40 of that is shipping.
Potaba appears to have been used successfully in the treatment of Peyronies disease and they were on it from 3 months to 2 years.
"The authors suggest that this medication offers no hazard of further local injury as may result from other therapy. There were no significant untoward effects encountered on long term POTABA® therapy."
That is encouraging as long as the salt is no more harmful than Potaba which is apparently non toxic.
I would want to take start taking this 2 weeks before I start Trimix for 8 further weeks.
I noticed Relaxin was another option as a potentiator. Some info here
http://www.samyue.com/relaxinhormonereplacementtTherapy.htm
Or as you say DHT which might be preferable as it can be applied topically.