Sometimes commercial meds don’t check all the boxes. That’s where compounding comes in. At Central Drug, we prepare custom formulations from scratch by adjusting ingredients, strength, and dosage forms to match a prescriber’s exact instructions. We’ve been doing this for decades right here in Victoria, Texas. If you’ve been searching for compounding pharmacies in Victoria that still do things by hand, you’re in the right place.
One of the most common questions we get is about compounded injections for men’s health—specifically the difference between quad-mix, tri-mix, and bi-mix. These aren’t brand names—they’re descriptive terms for combinations of active ingredients. Here’s how each one works.

Bi-Mix: The Starting Point
Bi-mix is often where patients begin. It combines papaverine and phentolamine, two vasodilators that increase blood flow. This mix skips alprostadil, which can cause discomfort for some. It’s a popular option for those who want a simpler formula with fewer side effects. If your prescriber recommends starting slow, bi-mix is often the first step.

Tri-mix: More Power, Same Injection
Tri-mix builds on the bi-mix foundation by adding alprostadil, a powerful compound that encourages blood vessel expansion. Together, papaverine, phentolamine, and alprostadil pack more punch for patients who need something stronger. Tri-mix is one of the most prescribed formulas at compounding pharmacies like ours. We fine-tune the ratio based on your provider’s direction.

Quad-mix: When Even More Support Is Needed
Quad-mix is the most advanced formula of the three. It contains the same three ingredients as tri-mix but adds atropine to boost effectiveness. Atropine can help improve response time and reduce the chance of the medication wearing off too soon. It’s typically reserved for cases where bi-mix and tri-mix didn’t get the job done. Not all local pharmacies in Victoria prepare quad-mix, but we do.

Formulation Ratios Matter
The strength of each compound can be adjusted based on your provider’s plan. One patient’s tri-mix may be much stronger than another’s. That’s the value of working with compounding pharmacies who can get those ratios just right.
Each formula we fill is made fresh when your prescription is received. No two batches are exactly alike because no two patients are exactly alike. As one of the leading pharmacies in Victoria focused on compounding, Central Drug makes these formulas in-house, using cleanroom protocols and strict quality control. Give us a call, and let’s get your prescription started.