Operating expenses, excluding impairment expense and amortization of intangible assets, were $21.1 million in the fourth quarter of fiscal 2022 compared to $25.6 million in the year ago fourth quarter. Research and development expenses were $3.7 million in the fourth quarter of fiscal 2022 compared to $4.8 million in the year ago fourth quarter. Of this $3.7 million, $1.5 million was comprised of milestone payments made upon the achievement of certain AR101 regulatory milestones.
Net loss was impacted by impairment of $10.8 million due to the $8.6 million impairment of goodwill associated with its 2020 Innovus acquisition, primarily driven by the decline in Aytu's market capitalization, and $2.2 million impairment due to the discontinuation of certain consumer products.
Net loss for the fourth quarter of fiscal 2022 was $(17.7) million, or $(0.49) per share, compared to $(19.0) million, or $(0.81) per share for the same quarter last year.
Fiscal 2022 Financial Results
Net revenue for fiscal 2022 was $96.7 million, compared to $65.6 million for fiscal 2021, a 47% increase year-over-year.
Net revenue from Prescription products for fiscal 2022 was $61.1 million, compared to $32.7 million in fiscal year 2021, an increase of 87%. ADHD brands Adzenys XR-ODT and Cotempla XR-ODT experienced 294% growth in net product revenue to $42.8 million in fiscal 2022 compared to fiscal 2021. The ADHD products were acquired in March of 2021 and reflect a prior fiscal year stub period of ownership. Prescription pediatric portfolio comprised of Poly-Vi-Flor, Tri-Vi-Flor, and Karbinal ER experienced 29% growth in net prescription revenue to $16.1 million in fiscal 2022 compared to $12.4 million for the year ended June 30, 2021.
Net revenue for fiscal 2022 from the Consumer Health franchise was $35.5 million, compared to $33.0 million last year, an increase of 8%. This revenue growth was achieved despite short-term supply chain disruptions, which the Company believes have been addressed.
Gross profit increased to $52.3 million, or 54% of net revenue, in fiscal 2022, compared to $29.2 million, or 44% of net revenue, in fiscal 2021. The improvement in gross margin percentage was primarily due to improvements in the ADHD and Pediatric product lines, a result of cost reduction efforts and greater volume, and the impairment of inventory in fiscal 2021. The reduction of gross margins in the Consumer Health segment was due to the growth of the e-commerce business, which generates lower gross margins (but higher contribution margins) than the direct to customer business.
Operating expenses, excluding impairment expense and amortization of intangible assets, was $84.3 million in fiscal 2022 compared to $69.2 million in fiscal 2021. The change was primarily the result of the acquisition of Neos, which was completed on March 19, 2021. Research and development expenses were $14.4 million in fiscal 2022 compared to $5.6 million in fiscal 2021. The increase in R&D was primarily related to investments made to advance AR101, inclusive of milestone payments paid in a combination of cash and common stock.
During the year ended June 30, 2022, the Company recognized total impairment expense of $75.5 million, consisting of (i) $65.8 million in goodwill primarily a function of the decrease in Aytu’s market capitalization, (ii) $7.1 million intangible assets, (iii) $2.0 million inventory, (iv) $0.4 million other assets and (v) $0.2 million property and equipment. The impairment expenses related to write-down of assets was due to the discontinuation of certain products in our Prescription segment. During the year ended June 30, 2021, the Company recognized impairment expense of $12.8 million related to impairment of the Tuzistra and Natesto licensed intangible assets, which were divested on March 31, 2021.