Piracetam is a synthetic nootropic agent of the racetam class, chemically related to gamma-aminobutyric acid (GABA). It is a cyclic derivative of GABA but does not bind to GABA receptors. It is widely used in India for cognitive enhancement, cortical myoclonus, and as an adjunct in various neurological conditions. It is believed to improve neuronal and cognitive functions without acting as a sedative or stimulant.
Adult: **Cognitive Disorders:** 1.2 - 2.4 g/day in 2-3 divided doses, may increase to 4.8 g/day. **Cortical Myoclonus:** Start at 7.2 g/day in 2-3 divided doses, increase by 4.8 g/day every 3-4 days to a max of 20 g/day. Maintenance: 12-18 g/day. **Vertigo:** 2.4 - 4.8 g/day in divided doses.
Note: Oral tablets/syrup can be taken with or without food. To minimize GI upset, take with meals. The daily dose should be divided. Do not crush or chew sustained-release formulations. For IV use (hospital setting), administer as a slow infusion.
The exact mechanism is not fully elucidated. Piracetam is believed to act on neuronal and vascular components. It modulates neurotransmission, enhances neuroplasticity, improves cerebral microcirculation, and protects against hypoxia. It influences membrane fluidity of neuronal and vascular cells, facilitating information processing.
Pregnancy: Category B: Animal studies show no risk, but human data insufficient. Use only if clearly needed and benefit outweighs risk. Crosses the placenta.
Driving: May cause drowsiness, dizziness, or visual disturbances. Patients should not drive or operate machinery until their individual response is known.
| Anticoagulants (Warfarin, Acenocoumarol) & Antiplatelets (Clopidogrel, Aspirin) | Additive antiplatelet effect, increased risk of bleeding | Major |
| Antihypertensives | Piracetam may have a mild hypotensive effect; potential additive lowering of BP | Moderate |
| Thyroid Hormones (Levothyroxine) | Piracetam may increase T4 levels and decrease T3 levels; monitor thyroid function | Moderate |
| Central Nervous System Depressants (Alcohol, Benzodiazepines) | May potentiate drowsiness and dizziness | Moderate |
| Stimulants (Amphetamines, Methylphenidate) | May increase risk of nervousness, insomnia, and hyperactivity | Moderate |