NC'd because this is quite detailed and could out me, but I'm a MN regular.
FIL started having unexplained seizures towards the end of last week and was taken to hospital. They've done an X-ray and an MRI, both of which were inconclusive. Yesterday DP and I learned that they've sent him home from the hospital, untreated and without a diagnosis or any follow-up treatment plan because the neurologist is on holiday.
They've given MIL a number to ring, to make her own appointment with the neurologist. She's rung it hundreds of times and no-one ever picks up.
Meanwhile they've given him anti-convulsives suitable for treating epilepsy, despite not being diagnosed with epilepsy. DP has seen epileptic fits, and seen his dad's seizures, and says they don't look anything alike - his dad's seizures look more like a stroke (which he's also seen). FIL is still having seizures - sometimes several a day - at home, where there's only MIL to care for him (she's recovering from an operation herself). DP is desperately worried that without oxygen or proper trained care on hand he could end up oxygen-deprived, have a heart attack, fall down the stairs or something. Basically that they've just abandoned him and these seizures could finish him off. 
It's like they've just washed their hands of him and sent him home to die. He's 65. AIBU to be shocked and appalled and furious?
Please if anyone has experience of getting proper care from the NHS, we'd welcome your advice.