Try this
Me.Combo2.RowSource = "SELECT [hips_product].Product, [hips_product].Quantity, [hips_product].Sales_12_month, [hips_product].Sales_3_month FROM [hips_product] " & _
"WHERE [HOSPITAL NO & NAME] = '" & Me.Combo0 & "' ORDER BY [hips_product].products"
Me.Combo2.Requery