Carbon monoxide poisoning can be fatal, symptoms include headache, dizziness, nausea, and vomiting. Torticollis are spasms of the neck muscles causing neck pain and stiffness, tilted head, and more. Cervical spinal stenosis is a spinal condition causing pain, weakness, or numbness in the arms, legs, or neck.
Symptoms of DTs, which usually peak at 5 days, include: 1  Disorientation, confusion, and severe anxiety. 2  Hallucinations (primarily visual) which cannot be distinguished from reality. 3  Profuse sweating. 4  Seizures. High blood pressure.  Racing and irregular 1  heartbeat. Severe tremors.  Low-grade fever.
Symptoms and Signs of Methylphenidate Withdrawal. Methylphenidate withdrawal symptoms can be both physical and mental. Fatigue and disturbed sleep patterns are common signs of methylphenidate withdrawal. Users undergoing detoxification also report cravings for methylphenidate. Some users develop depression after halting methylphenidate use.