High-stim fat burner tablet with 150mg caffeine and 25mg synephrine.
Hi-Tech Pharmaceuticals Stimerex-ES isn't your everyday energy pill or one of those mild fat burners with clean labels. This is an old-school high-stim fat burner tablet that's all about mixing different stim paths to ramp up your alertness, workout drive, and fat-cutting power. It combines 150mg caffeine anhydrous with a 510mg proprietary blend that has ephedra leaf extract, Senegalia berlandieri alkaloids, 2-aminoisoheptane HCl, theobromine, Citrus aurantium giving 25mg synephrine, green tea extract, yohimbe extract, naringin, and 6,7-dihydroxybergamottin.
That 150mg caffeine is fully listed, so you know exactly what you're getting as the base. Caffeine blocks adenosine receptors—that's the stuff that makes you feel tired—so it sharpens you up and cuts fatigue. Here, it feels way stronger than just 150mg because it's backed by a ton of other stims.
Citrus aurantium delivers 25mg synephrine, a solid amount you see in fat burners for boosting metabolism and curbing appetite through adrenaline-like effects, especially when dieting. Ephedra leaf extract is in at 25mg, but without details on the active parts, it's hard to pin down exact strength—still, it's there for that classic fat-burning vibe.
Senegalia berlandieri extract brings phenylethylamine alkaloids like phenylethylamine, methylsynephrine, N-methyl-beta-phenylethylamine, and N,N-dimethylphenylethylamine. These hit quick for mood lifts, urgency, and extra stim kick that you feel right away.
Hi Tech Stimerex-Es by Hi Tech contains 150mg Caffeine (anhydrous), a effective dose for training performance and pump.
Key Highlights
- 150mg Caffeine Anhydrous — this is your solid base for quick alertness by blocking that tired feeling. In this mix, that 150mg packs more punch than a plain caffeine pill because it's stacked with other stims in the proprietary blend.
- 25mg Synephrine from Citrus Aurantium — a good dose for fat-burning support that amps up energy and helps with dieting through adrenaline effects. It's one of the few things here with a clear amount, so you can judge it easily.
- 510mg Proprietary Stimulant Blend — this is where most of the power comes from, blending a bunch of ingredients for a deeper, harder-hitting feel instead of just relying on caffeine. The good side is a stacked experience; the downside is you don't see individual doses for the big players.
- Ephedra Leaf Extract at 25mg — thrown in to give that throwback fat-burner edge. No details on the active strength, so you know it's there but not exactly how potent.
- Senegalia Berlandieri Extract — delivers phenylethylamine alkaloids like phenylethylamine and methylsynephrine types. These are great for fast mood boosts, drive, and that early stim intensity you notice right off the bat.
- 2-Aminoisoheptane HCl — another stim to stretch and crank up the brain buzz beyond caffeine. Dose isn't shown, so think of it as part of what makes this a serious high-stim option.
- Theobromine — helps smooth out the energy so it's not all spike and crash. Studies show it's different from caffeine, often used here for a steadier, longer stim feel.
- Yohimbe Extract — a classic in tough fat burners for extra adrenaline kick. It can ramp up intensity and diet motivation for the right person, but for others, it might make things feel too edgy.
Hi Tech Stimerex-Es by Hi Tech contains 150mg Caffeine (anhydrous), a effective dose for training performance and pump.
Who Is This For?
- Seasoned dieters in deep calorie cuts needing a strong boost for cardio or mornings. The 150mg caffeine, 25mg synephrine, yohimbe, and hidden stims focus on drive, alertness, and hunger control over easy vibes.
- Pro stim users who know their limits from multi-stim stuff, not just caffeine. It's spot-on for those who get yohimbe, synephrine, and DMHA, wanting that stacked feel in a tablet.
- Early risers doing fasted cardio or low-cal workouts who want real motivation without chugging pre-workout. Tablets are handy, and it's more about heat and mental kick than pumps or fluids.
- Bodybuilders cutting who'll take edgier energy for better fat burn. It's for folks who want to feel on fire, warmer, and pumped when low cals zap your spark.
- Busy folks using a fat burner for focused energy in cut phases. Caffeine, theobromine, PEA alkaloids, and adrenaline boosters crank up your task power.
- People who like tablets over powders for a portable fat burner before sessions. Great if you skip flavors, pumps, or big scoops and just want hard-hitting heat.
How to Use
Kick off with 1 tablet to check how it sits, about 20-30 minutes before training, cardio, or your big energy need. It's high-stim with extra hidden stuff beyond the 150mg caffeine, so don't treat it like casual coffee first time. Empty stomach speeds it up for many, but if stims bug your gut, add a light bite. Wash it down with water. Skip stacking with other stim-heavy gear like pre-workouts or big coffees unless you've got the experience. Pair with non-stims like creatine, electrolytes, or protein instead. Cycle it to fight tolerance—don't run forever. Keep it sealed in a cool, dry spot away from heat.
What to Expect
First 10-15 minutes, no hassle with mixing like powders, so it's easy for fasted starts. By 15-30 minutes, caffeine brings the initial alertness, then the blend adds real heat and stim punch. Peak hits around 30-60 minutes: more drive, sweat, sharp focus, and that fat-burner vibe stronger than plain caffeine. From 60-120 minutes, theobromine and mix keep it going without a hard crash. Days 1-7, you'll figure quick if yohimbe and synephrine work for you. Weeks 2-4, it's not about building up but adapting—tolerance can soften the edge, so cycling keeps it fresh.
Key Ingredients
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Caffeine Anhydrous — 150mg — Fast, reliable alertness with strong workout-day wakefulness
Hi Tech Stimerex-Es by Hi Tech contains 150mg Caffeine (anhydrous), a effective dose for training performance and pump.
Frequently Asked Questions
How much caffeine is in Stimerex-ES per tablet?
Each tablet provides 150mg caffeine anhydrous. The important context is that the formula also contains multiple additional stimulants inside a 510mg proprietary blend, so the real-world intensity feels stronger than a standalone 150mg caffeine product.
Is Stimerex-ES a pre-workout or a fat burner?
It is best classified as a high-stim thermogenic fat burner that can also be used before training or cardio. It does not contain classic pre-workout performance ingredients like citrulline, beta-alanine, or creatine; instead, it focuses on stimulant drive, thermogenesis, and dieting intensity.
What makes this formula feel stronger than the caffeine number suggests?
Beyond the 150mg caffeine, the proprietary blend includes 25mg synephrine, ephedra extract, yohimbe extract, 2-aminoisoheptane HCl, Senegalia berlandieri alkaloids, and theobromine. Those ingredients create a layered stimulant effect that most users perceive as considerably more aggressive than caffeine alone.
When should I take Stimerex-ES?
Take 1 tablet about 20-30 minutes before cardio, training, or the time of day when you want the strongest thermogenic push. Many experienced users prefer it before fasted cardio, but stimulant-sensitive users may tolerate it better with a light meal.
Can I stack Stimerex-ES with coffee or pre-workout?
In most cases, no. Since the formula already combines 150mg caffeine with several additional stimulants, stacking it with coffee, energy drinks, or a full stim pre-workout can push the experience into uncomfortable territory very quickly.
Is the formula fully transparent?
No. Caffeine is disclosed at 150mg, and the formula confirms 25mg ephedra extract plus 25mg synephrine within a 510mg proprietary blend, but most of the important actives inside that blend do not have individual doses listed.
What does theobromine add to a formula like this?
Theobromine is often used to create a smoother, more extended stimulant curve than caffeine alone. In Stimerex-ES, it likely helps broaden the energy feel so the formula is not just an immediate spike and drop.
Who should avoid this product?
Beginners, stimulant-sensitive users, pregnant or nursing women, anyone under 18, and anyone with cardiovascular issues, high blood pressure, anxiety disorders, or stimulant-related medication interactions should avoid it. This is an advanced high-stim product, not a general wellness supplement.
Will I build tolerance to Stimerex-ES?
Yes, that is a realistic expectation with repeated use. Because the formula relies heavily on stimulant-driven effects, many users find the initial intensity softens over time and choose to cycle use during specific cutting phases.
Is Stimerex-ES good for fasted cardio?
That is one of the clearest use cases for this product. The tablet format, strong stimulant profile, and thermogenic positioning make it especially attractive for experienced users doing low-calorie or fasted morning cardio.
