the recommended dose of memantine Hcl (NAMENDA) week 1, \( 5 \mathrm{mg} / \) day week 2, 10 mg /day ( 5 mg , b.i.d) week \( 3,15 \mathrm{mg} / \) day \( (20 \mathrm{mg} \),a.m ,5mg p.m) week 4, 20mg /day ( 10 mg b.i .d.) How many 5 mg must be dispensed for a 4-week supply of the medication