The Semaglyn 15 mg Cartridge Injection (3 ml) pen can deliver 1 mg doses if it is designed to allow precise dosing increments, but typically, 3 ml total containing 15 mg means each 0.2 ml corresponds to 1 mg, so 15 equal 1 mg doses are possible. However, the exact dosing capability depends on the pen's dose increment settings.

Regarding storage, if the pen is stored in the refrigerator, it generally helps maintain medication stability, but most injectable cartridges like this usually have a recommended in-use period of up to 4 weeks after first opening. Storing it for 15 weeks may exceed the advisable limit and could reduce effectiveness or safety.

🩺 Recommendation

Please consult an endocrinologist or the prescribing specialist to confirm dosing accuracy with your specific pen device and detailed storage guidelines based on the manufacturer's instructions.