Product is provided for lawful laboratory research by qualified professionals only
A stimulant that raises heart rate and blood pressure should come with that kind of supervision rather than arrive in an envelope with no one watching

Owners commonly notice one or more of the following: Limping or lameness: favoring a limb, "toe-touching," or intermittent limping that comes and goes Stiffness after rest: difficulty rising after sleeping, or a slow, stiff first few minutes that loosens with movement Reluctance to jump, climb, or use stairs: hesitating at the car, couch, or staircase they used to handle easily Reduced activity or stamina: shorter walks, less play, or lagging behind on familiar routes Audible joint changes: clicking or popping from a joint, particularly the stifle (knee) Muscle loss: visible thinning of the muscle on one hind limb compared with the other, a sign of chronic underuse Behavioral changes: licking a joint, irritability when a limb is handled, or a drop in overall mood tied to discomfort A sudden non-weight-bearing lameness the dog will not put any weight on a leg warrants prompt veterinary attention rather than watchful waiting, as it can indicate an acute cruciate rupture or fracture

Serious complications are uncommon but should be reported promptly to a clinician
Inject and pull to see if there is blood
Several things influence how long a B12 injection lasts for you: Your current B12 levels: the lower you start, the more your body tends to hold on to, which can stretch the effect