Pseudoephedrine Hydrochloride and hallucinations

I take no regular medication, but in this last year I have begun furtively taking pseudoephedrine hydrochloride, 30 mg per tablet, plus ibuprofen 200 mg per tablet, two tablets with breakfast, nearly every day. Within an hour my head is clear, I am calm, able to focus on my work or tai chi practice and feel benevolent toward the world. This continues for about five hours. No urinary problems, no hallucinations that I know of, just calm well-being. Doesn't seem right, somehow, but it's hard to give up simply on principle.

Dizziness and hallucinations I have experienced.
With sudafed tablets and an extreme high.

After 3 days of taking sudafed cold formula, my 84 y/o mother-in-law began to experience hallucinations. The recommended dose was 2 tabs every 6-8 hrs and not to exceed 8 tabs a day. She was taking no more than 6 tabs a day. She does not have any comorbidities. Has this ever been reported? and how could she be treated?