It is not a controlled substance or scheduled narcotic under Thai law
Most researchers use a standard U-100 insulin syringe for dosing peptides

The following are the most consistently reported signs: Sudden, sharp tightening in a specific muscle group (back, neck, leg, shoulder, calf, hand, or forearm) Muscle twitching or visible rippling beneath the skin a phenomenon called fasciculationsespecially in the abdomen, thighs, or eyelids A hard, knotted area in the muscle that is tender to the touch (often called trigger points or muscle knots) Reduced range of motion after a spasm, coupled with muscle stiffness lasting hours or days Burning or aching pain radiating from the spasm site common in cervical spasms and lumbar back spasms Nocturnal cramping waking from sleep due to leg cramps at night, charley horses, or toe cramps Stomach twitching or quivering in the abdomen, particularly with dehydration or electrolyte imbalance Root Causes of Persistent Muscle Cramps & Spasms Understanding what causes chronic muscle spasms is the most important step toward effective treatment

For those in higher-risk categories (over 60, metformin users, vegans), additional B12 supplementation beyond the formulation may be warranted
Different forms require different handling