One 4ml cartridge holds the powder and the bacteriostatic water in two separate chambers, divided by a bypass seal. Click the cartridge into the holder, twist until it clicks, and the pen performs the reconstitution itself — then dial your dose on the ring. No vial, no syringe, no drawing up, and nothing for you to mix. The pen body is reusable; the cartridge is not.
The cartridge has two compartments: lyophilised powder in one, diluent in the other, held apart until use. Joining them mixes the contents inside the device. It is one unit, not two pens.
No. The diluent is already in the second chamber, which is the point of the format. You will still need pen needles, which are supplied separately.
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Kholofelo L. · 30 Sep 2026
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Small checkout glitch, but after following up it was quickly sorted out and everything went smoothly from there. Good customer service - thank you.
Tonia K. · 30 Sep 2026
★ 4.8 across all 16 JP Research reviews, good and bad. See them. Every reviewer gets R100 store credit, whatever they rate.
Follow my channel — every couple of weeks I drop one genuinely useful thing: how to read a COA, reconstitution math, the odd honest deal. No spam, no hype.
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