With OptiHaler Drug Delivery System, proper MDI technique is easy. Optihaler encourages correct MDI techniques for consistent drug delivery, every time. It helps eliminate the problems patients have with timing. Optihaler's unique design limits the patient's air intake until the MDI is depressed coordination actuation of the canister iwth the beginning of inhalation. And, OptiHaler's design allows it to be smaller, more portable and as effective as conventional spacers and holding chambers. Although it's small, a patient can store their MDI canister inside, making OptiHaler truly portable and convenient.