Pyritinol is a neurotropic agent, a synthetic derivative of pyridoxine (Vitamin B6). It is a nootropic and neuroprotective drug used primarily to enhance cognitive function, improve cerebral metabolism, and treat symptoms of cognitive decline. It acts by increasing cerebral glucose uptake, enhancing cholinergic neurotransmission, and stabilizing neuronal membranes. In India, it is widely prescribed for conditions like post-stroke cognitive impairment, traumatic brain injury sequelae, and age-related memory deficits.
Adult: 200mg twice or thrice daily (400-600 mg/day). The usual recommended dose is 600 mg/day in divided doses.
Note: Administer with or after meals to minimize gastric upset. Tablet should be swallowed whole with a glass of water. Do not crush or chew. Evening doses should be taken at least 3-4 hours before bedtime to avoid potential insomnia.
Pyritinol enhances cerebral metabolism by increasing the uptake and utilization of glucose and oxygen by brain cells. It facilitates neuronal transmission by modulating neurotransmitter systems, particularly acetylcholine, and exhibits antioxidant properties. It improves neuronal membrane fluidity and stability, promotes neuroplasticity, and may have mild antiplatelet effects.
Pregnancy: Category C: Animal studies are insufficient. Use during pregnancy only if the potential benefit justifies the potential risk to the fetus. Not recommended.
Driving: May cause dizziness or restlessness. Patients should be cautioned about operating machinery or driving until they know how the drug affects them.
| Levodopa | Pyritinol may antagonize the therapeutic effect of levodopa in Parkinson's disease. | Major |
| Anticoagulants (Warfarin, Acenocoumarol) | Theoretical increased risk of bleeding due to mild antiplatelet effect; monitor INR. | Moderate |
| Other CNS Stimulants (Modafinil, Methylphenidate) | Additive CNS stimulation, may increase risk of insomnia, nervousness, and tachycardia. | Moderate |
| Antiepileptics (Phenytoin, Phenobarbital) | Theoretical potential to lower seizure threshold; clinical significance unclear. | Moderate |
| Alcohol | May negate the cognitive benefits of pyritinol and worsen dizziness. | Moderate |
Same composition (Pyritinol (200mg)), different brands: