Comparison
Coenzyme Q10 vs Modafinil
Side-by-side of Coenzyme Q10 and Modafinil. Every row below is pulled from the compound schema and will update as our data grows. For deeper reads, follow through to each compound page.
Coenzyme Q10
CoQ10 supplement guide: 100 to 300 mg/day dosing, ubiquinol vs ubiquinone absorption, Q-SYMBIO heart failure data, statin myalgia evidence.
Modafinil
Modafinil cognitive enhancement profile: wakefulness-promoting agent, 100-200 mg dosing, 12-15 hour half-life, off-label nootropic use, Schedule IV status.
Effects at a glance
Coenzyme Q10
- •Q-SYMBIO trial showed 43% reduction in major cardiovascular events at 300 mg/day in heart failure
- •Reduces statin-induced myalgia in some patients at 100-200 mg/day per Banach 2014 meta-analysis
- •Migraine prophylaxis at 300 mg/day daily; AHS lists at Level B for prevention
- •Ubiquinol absorbs 2-3x better than ubiquinone in adults over 60
- •Plasma CoQ10 falls 15-40% with chronic statin therapy
- •Small blood pressure reduction (3-5 mmHg systolic) at 100-200 mg/day
Modafinil
- •FDA approved in 1998 for narcolepsy, with later additions for shift-work sleep disorder and OSA residual sleepiness
- •Schedule IV controlled substance in the US; prescription-only in EU, UK, Australia
- •Increases wakefulness via weak dopamine reuptake inhibition plus histaminergic, noradrenergic, and orexinergic activation
- •Long half-life of 12 to 15 hours requires morning dosing to avoid sleep disruption
- •Modest cognitive enhancement signal in non-sleep-deprived adults at 100 to 200 mg (Battleday meta-review 2015)
- •Substantial CYP3A4 induction reduces hormonal contraceptive efficacy; barrier methods recommended
Side-by-side
| Attribute | Coenzyme Q10 | Modafinil |
|---|---|---|
| Category | supplement | pharmaceutical |
| Also known as | CoQ10, ubiquinone, ubiquinol, Q10 | Provigil, Modalert, Modvigil, diphenylmethylsulfinyl-acetamide |
| Half-life (hr) ↗ | 34 | 13 |
| Typical dose (mg) ↗ | 200 | 200 |
| Dosing frequency | 1 to 3 times daily with a fat-containing meal | daily, morning |
| Routes | oral | oral |
| Onset (hr) | 6 | 1 |
| Peak (hr) | 720 | 3 |
| Molecular weight | 863.36 | 273.35 |
| Molecular formula | C59H90O4 | C15H15NO2S |
| Mechanism | Mobile electron carrier between Complex I/II and Complex III of the mitochondrial electron transport chain. Ubiquinol form acts as a lipid-soluble antioxidant in cell membranes and regenerates oxidized vitamin E. | Weak dopamine reuptake inhibition plus downstream activation of histaminergic, noradrenergic, and orexinergic wake-promoting systems. |
| Legal status | Dietary supplement (most jurisdictions); prescription cardiac medication in Japan | Schedule IV (US); prescription-only globally; not a supplement |
| WADA status | allowed | banned |
| DEA / Rx | Not scheduled | Schedule IV |
| Pregnancy | Limited safety data; precautionary use at standard doses | Not recommended |
| CAS | 303-98-0 | 68693-11-8 |
| PubChem CID | 5281915 | 4236 |
| Wikidata | Q140453 | Q422968 |
Safety profile
Coenzyme Q10
Common side effects
- mild GI upset (rare)
- headache (rare)
- insomnia at very high doses
Contraindications
- active warfarin therapy without monitoring (modest interaction with INR)
Interactions
- warfarin: structural similarity to vitamin K may modestly reduce warfarin efficacy; monitor INR(moderate)
- antihypertensives: additive blood pressure-lowering at high doses(minor)
- statins: statins reduce CoQ10 synthesis; CoQ10 supplementation does not affect statin efficacy(minor)
- chemotherapy (oxidative-stress-dependent agents): theoretical interference; coordinate with oncology team(moderate)
Modafinil
Common side effects
- headache
- nausea
- anxiety
- insomnia (with late-day dosing)
- dry mouth
- mild blood pressure elevation
Contraindications
- recent myocardial infarction
- unstable angina
- left ventricular hypertrophy
- significant arrhythmia
- history of Stevens-Johnson syndrome
- psychotic disorders
- pregnancy
- concurrent MAOI use
Interactions
- hormonal contraceptives: CYP3A4 induction reduces contraceptive efficacy; use barrier method(major)
- cyclosporine: reduced cyclosporine levels via CYP3A4 induction(major)
- warfarin: CYP2C9 inhibition raises INR(moderate)
- phenytoin: CYP2C19 inhibition raises phenytoin levels(moderate)
- MAOIs: potential hypertensive reaction(major)
- classical stimulants (amphetamine, methylphenidate): additive cardiovascular and sleep-disruption effects(moderate)
Which Should You Take?
Coenzyme Q10 comes out ahead for most readers on the criteria we weight: 3 catalogued goals, OTC dietary supplement, oral dosing, with a Tier-A outcome catalogued. Modafinil is the right call when one of the conditionals below applies.
- → If your priority is cardiovascular health, pick Coenzyme Q10.
- → If your priority is healthspan extension, pick Coenzyme Q10.
- → If your priority is wakefulness, pick Modafinil.
- → If your priority is focus or working memory, pick Modafinil.
Edge case: If you want to avoid controlled substance, Coenzyme Q10 is the more accessible choice.
Default choice: Coenzyme Q10. Lower friction to source, a Tier-A evidence outcome catalogued, and broader goal coverage. Reach for Modafinil only if your priority sits squarely in the goals it owns above.
This verdict is generated from each compound's schema (goals, legal status, evidence outcomes, dosing route). It updates automatically as our compound data evolves; the deeper read sits on each individual compound page.
Common questions
What is the difference between Coenzyme Q10 and Modafinil?
Coenzyme Q10 and Modafinil differ in category (supplement vs pharmaceutical), mechanism, and typical dosing. See the side-by-side table for full details.
Which has a longer half-life, Coenzyme Q10 or Modafinil?
Coenzyme Q10 half-life is 34 hours; Modafinil half-life is 13 hours.
Can you stack Coenzyme Q10 with Modafinil?
Stack compatibility depends on mechanism overlap, legal status, and individual response. Check each compound page for specific interactions and contraindications before combining.
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