Posted By John Morris On 28 Sep 2025 Comments (0)

Nootropic Comparison Tool
Select a nootropic to compare its key attributes:
Comparison Table
Substance | Typical Dose | Onset | Duration | Common Side Effects | Legal Status (US) |
---|---|---|---|---|---|
Nootropil (Piracetam) | 800 mg-4.8 g daily | 30-60 min | 4-6 hrs | Headache, insomnia (rare) | Prescription-only |
Aniracetam | 750 mg-1.5 g daily | 15-30 min | 2-3 hrs | Anxiety, irritability | OTC in EU, prescription in US |
Oxiracetam | 800 mg-2 g daily | 30-45 min | 3-5 hrs | Headache, nausea | Prescription-only |
Pramiracetam | 300 mg-1.2 g daily | 45-60 min | 8-12 hrs | Headache, GI upset | Prescription-only |
Phenylpiracetam | 100-200 mg daily | 15-30 min | 3-5 hrs | Insomnia, jitteriness | Prescription-only (banned in sport) |
Noopept | 10-30 mg daily | 10-20 min | 4-6 hrs | Irritability, headache | OTC in many countries, unregulated in US |
Modafinil | 100-200 mg daily | 30-60 min | 12-15 hrs | Dry mouth, anxiety | Prescription-only |
Adrafinil | 300-600 mg daily | 45-90 min | 12-15 hrs | Liver enzyme elevation (long-term) | OTC (unregulated) |
When people look for a brain‑boosting pill, Nootropil is the brand name most often associated with piracetam, the original racetam that launched the modern nootropic movement. If you type Nootropil into a search engine, you’ll quickly see it listed alongside a slew of newer compounds promising sharper focus and faster learning.
Quick Take
- Nootropil (piracetam) is the oldest, well‑studied racetam but may feel mild for many users.
- Aniracetam and oxiracetam are faster‑acting and more potent for memory tasks.
- Pramiracetam offers the longest duration, useful for extended study sessions.
- Phenylpiracetam adds a stimulant kick, while Noopept is a peptide‑based alternative.
- Modafinil and adrafinil are wake‑promoting agents, not racetams, but often compared for cognitive boost.
What is Nootropil (Piracetam)?
Piracetam is a synthetic derivative of the neurotransmitter gamma‑aminobutyric acid (GABA) that enhances neuronal membrane fluidity. First synthesized in the 1960s, it became the prototype for an entire family of compounds called racetams. In most countries it’s sold as a prescription‑only cognitive enhancer, while in others it’s available over the counter.
How Does Piracetam Work?
Scientists believe piracetam modulates the blood‑brain barrier and improves the function of the neurotransmitter acetylcholine. The result is modest gains in memory consolidation and neuroprotection, especially in older adults or people with mild cognitive impairment. However, the effect size is generally smaller than that of newer racetams.

Top Alternatives - What They Are
Below is a quick rundown of the most frequently mentioned substitutes, each introduced with its own microdata definition.
Aniracetam is a fat‑soluble racetam known for its rapid onset (15‑30minutes) and mood‑enhancing properties. Users often report clearer thinking and reduced anxiety.
Oxiracetam is a water‑soluble racetam that emphasizes logical reasoning and spatial awareness. It tends to be stronger than piracetam but still well tolerated.
Pramiracetam is a high‑potency racetam with a long half‑life (up to 12hours) that boosts long‑term memory. It is often paired with choline sources to avoid headaches.
Phenylpiracetam is a modified piracetam that adds a phenyl group, giving it stimulant‑like energy and physical endurance benefits. Athletes sometimes use it for improved performance, though it’s banned in many sports.
Noopept is a peptide‑derived nootropic that is up to 1000times more potent than piracetam in animal studies. It claims fast cognition boosts and neuroprotective effects.
Modafinil is a prescription wake‑promoting drug that works on orexin and dopamine pathways, often classified as a “smart drug”. It’s favored for staying alert during long work hours.
Adrafinil is a pro‑drug of modafinil, metabolized in the liver to produce similar wakefulness effects. Because it’s not a controlled substance in many regions, it’s popular among those who can’t obtain modafinil legally.
Side‑by‑Side Comparison
Substance | Typical Dose | Primary Mechanism | Onset | Duration | Common Side Effects | Legal Status (US) |
---|---|---|---|---|---|---|
Nootropil (Piracetam) | 800mg-4.8g daily | Membrane fluidity & acetylcholine modulation | 30‑60min | 4‑6hrs | Headache, insomnia (rare) | Prescription‑only |
Aniracetam | 750mg-1.5g daily | AMPA‑receptor positive modulation | 15‑30min | 2‑3hrs | Anxiety, irritability | OTC in EU, prescription in US |
Oxiracetam | 800mg-2g daily | Glutamate‑receptor activation | 30‑45min | 3‑5hrs | Headache, nausea | Prescription‑only |
Pramiracetam | 300mg-1.2g daily | High‑affinity choline uptake | 45‑60min | 8‑12hrs | Headache, GI upset | Prescription‑only |
Phenylpiracetam | 100‑200mg daily | Enhanced dopamine & norepinephrine | 15‑30min | 3‑5hrs | Insomnia, jitteriness | Prescription‑only (banned in sport) |
Noopept | 10‑30mg daily | NGF/BDNF up‑regulation | 10‑20min | 4‑6hrs | Irritability, headache | OTC in many countries, unregulated in US |
Modafinil | 100‑200mg daily | Orexin & dopamine reuptake inhibition | 30‑60min | 12‑15hrs | Dry mouth, anxiety | Prescription‑only |
Adrafinil | 300‑600mg daily | Pro‑drug to modafinil | 45‑90min | 12‑15hrs | Liver enzyme elevation (long‑term) | OTC (unregulated) |
Safety, Tolerability & Legal Considerations
All racetams share a relatively benign side‑effect profile, but they can cause headaches when taken without a choline source. Aniracetam and oxiracetam are generally well tolerated, while phenylpiracetam’s stimulant component raises the risk of insomnia and cardiovascular strain.
Modafinil and adrafinil, although powerful for wakefulness, interact with several prescription medications and may elevate blood pressure. Long‑term use of adrafinil warrants periodic liver function tests because it is metabolized into modafinil via the hepatic CYP450 pathway.
Legal status varies widely. In the United States, piracetam, aniracetam, oxiracetam, pramiracetam, and phenylpiracetam are classified as unapproved “research chemicals,” meaning they can be sold for laboratory use but not marketed as dietary supplements. Modafinil remains a Schedule IV prescription drug, and adrafinil is sold as a dietary supplement in some states despite its close relation to a controlled substance.
Choosing the Right Nootropic for You
- If you’re new to cognitive enhancers, start with Nootropil or aniracetam at low doses and pair with a choline source like CDP‑choline.
- If you need a quick mental lift for exams or presentations, phenylpiracetam’s rapid onset and mild stimulant effect can be useful-just avoid late‑day dosing.
- For marathon study sessions, pramiracetam offers a long window of benefit, but you’ll likely need a larger daily choline intake.
- When sleep deprivation is the core issue, modafinil or adrafinil provide a stronger wake‑promoting action, though they should be reserved for occasional use and monitored by a clinician.
- People concerned about liver health should steer clear of adrafinil and opt for racetams that are metabolized primarily renally.
Regardless of the choice, start with the lowest effective dose, track your response, and consider cycling (e.g., 4 weeks on, 1 week off) to avoid tolerance buildup.

Frequently Asked Questions
Is piracetam legal in the United States?
Piracetam is not approved by the FDA for any medical use, so it cannot be sold as a dietary supplement. It is usually marketed as a “research chemical,” meaning you can buy it for lab purposes but not for personal consumption without a prescription.
How does aniracetam differ from piracetam?
Aniracetam is fat‑soluble, so it crosses the blood‑brain barrier faster and often feels more “energetic.” It also modulates AMPA receptors, which can improve mood and reduce anxiety, whereas piracetam’s effects are milder and mainly linked to acetylcholine.
Can I stack piracetam with choline?
Yes. Adding a choline source (e.g., CDP‑choline, alpha‑GPC) can prevent the occasional headache that some users experience with piracetam, as it supports the acetylcholine system that piracetam enhances.
Is phenylpiracetam safe for athletes?
Phenylpiracetam is banned by the World Anti‑Doping Agency (WADA). Using it before competition can lead to disqualification, so athletes should avoid it unless they have a therapeutic exemption.
Do I need a prescription for modafinil?
In the US, modafinil is a ScheduleIV prescription drug. You must see a licensed physician to obtain a legal prescription. Some online telehealth services can evaluate you and issue a prescription if appropriate.