After 15 days of treatment, the physician may not prescribe for or furnish to the addict more than any one of the following amounts of controlled substances during each day of the treatment:
(a) Four grains of opium.
(b) Two grains of morphine.
(c) Three grains of Pantopon.
(d) One-half grain of Dilaudid.
(e) Two hundred milligrams of isonipecaine (Demerol).