Caverject Impulse users are scarce. Most Docs start with Caverject Impulse (usually free) to see how it is handled by the patient. Not many will stay on it permanently. Impulse (the preloaded syringe) is more a doctor office provided item, being very costly to buy (about
$55 per dose here). Most who stay with Caverject move on to the premix liquid or powder in vials, with syringes, like we use for Bi and Trimix. I don't know about
the scaracity of Impulse. I do know when I went to get my first Caverject Powder prescript
ion, the pharmacist had to order it, it not being a normal stock item, but he didn't mention any scaracity of it. Maybe this is a problem within this particular pharmacy's supplier chain?