Cialis aka Tadalafil is not very water soluble, or in alcohol. Oral solutions will have small clumps. It will not dissolve. Dosing with a 1ml oral syringe will not be accurate.
I made mine in Ora-Plus and Distilled Water, before I researched patents on Tadalafil.
It worked, 1ml was around 10mg. Made 30ml. However, I could see various sized very small clumps if you hold a light to it.
I bought a Gemini milligram scale, and a set of 3 different sized micro spoons/scoops off amazon. My yellow micro scoop measure 15mg everytime (+/- 2mg).
I now go to a cheap store like Big Lots and buy a $3 supplement that has gel caps with powder. I empty some of the powder and manually load the caps with the micro scoop. Micro scoops and scale ordered shown below.
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The open scale is the American Weigh Scales GEMINI-20 Portable MilliGram Scale, 20 by 0.001 G. About $21 on Amazon.