Last updated: March 4, 2025
Viagra and Kamagra are the best-known names when it comes to erectile dysfunction medications, but both require a prescription and contain sildenafil—a pharmaceutical active ingredient that is not without risks for those with heart problems, blood pressure medication, or kidney function issues. Legal alternatives based on herbs and natural extracts work differently: they support blood flow, libido, and sexual energy through physiological mechanisms such as nitric oxide production and hormonal balance, without requiring a prescription. Below is an overview of the most popular products from the Dutch-Smart range.
How do natural erection and libido boosters work?
Most natural sexual stimulants work through two mechanisms: improving peripheral blood flow and supporting hormone production. Ingredients such as L-Arginine are precursors to nitric oxide (NO), which relaxes the smooth muscles in the blood vessels of the penis and thus facilitates an erection—the same mechanism that sildenafil enhances, but through a different pathway. Herbs such as Horny Goat Weed (Epimedium) contain icariin, which mimics phosphodiesterase-5 inhibition. Damiana and Maca act more on libido and stamina via dopaminergic pathways.
The difference from Viagra and Kamagra is that the effects are milder and more gradual. This makes these products less suitable for clinical erectile dysfunction, but particularly useful as a supportive remedy for situational libido issues, fatigue, or stress.
Sex-E 4 caps
Sex-E 4 caps combines Spanish Fly extract, Horny Goat Weed (icariin), L-Arginine, and Damiana. L-Arginine supports nitric oxide production, which improves blood flow to the genitals. Damiana has a mild stimulating effect on the nervous system and, with regular use, can support libido. The capsules are intended for use on an empty stomach, approximately 45 minutes before sexual activity.
Sex-E 4 caps at a glance
- Active ingredients: L-Arginine, icariin (Epimedium), Damiana, Spanish Fly extract
- Dosage: on an empty stomach, 45 minutes in advance
- Suitable for men and women
- Packaging: 4 capsules
Libido Gummies For Him
Libido Gummies For Him contain a combination of plant extracts in a gummy form, making them easier to take than capsules for those who have trouble swallowing pills. The recommended dosage is 1 to 2 gummies, taken approximately 30 to 45 minutes before activity. Due to the sugar-based formula, the active ingredients are absorbed slightly faster than with gelatin capsules. Do not combine with alcohol in large quantities, as this reduces effectiveness.
Libido Gummies For Him at a glance
- Gummy form: faster oral absorption than hard capsules
- Dosage: 1 to 2 gummies, 30 to 45 minutes in advance
- Do not combine with large amounts of alcohol
- Packaging: 180 grams
Big Boy Golden XXL
Big Boy Golden XXL is a tablet regimen designed to support erection quality and blood flow. The formula contains blood flow-enhancing ingredients that work cumulatively with consistent use over several weeks, unlike one-time boosters. This makes the product more suitable as part of a daily routine than as a fast-acting shot. Take with water, preferably at a set time of day.
Big Boy Golden XXL at a glance
- Works cumulatively with daily use over several weeks
- Focused on erection quality and blood flow
- Take with water at fixed times
- Packaging: 45 tablets
Sex Opium Liquid
Sex Opium Liquid is a liquid sexual stimulant based on plant extracts, developed for both men and women. The liquid works best on an empty stomach: take half a bottle approximately 45 minutes before sexual activity. The active ingredients are absorbed through the stomach lining and can produce a warm, relaxing sensation that enhances sexual pleasure. Do not use in combination with alcohol or other stimulants.
Sex Opium Liquid at a glance
- Liquid form: rapid absorption through the stomach lining
- Dosage: half a bottle, on an empty stomach, 45 minutes beforehand
- Suitable for men and women
- Do not combine with alcohol or other stimulants
- Contents: 10 ml per bottle
Camagra Man - 10 Capsules
Camagra Man is one of the best-selling natural erectile aids in the Netherlands. The capsules contain a blend of Maca extract, L-Arginine, Tribulus Terrestris, and zinc. Tribulus Terrestris may support the production of luteinizing hormone (LH), which indirectly stimulates testosterone production. Zinc plays a direct role in testosterone synthesis. The recommended dosage is 1 capsule on an empty stomach, 45 minutes before sexual activity. Do not take more than 2 capsules per 24 hours.
Camagra Man at a glance
- Active ingredients: Maca, L-Arginine, Tribulus Terrestris, zinc
- Dosage: 1 capsule, on an empty stomach, 45 minutes in advance
- Maximum 2 capsules per 24 hours
- Prescription-free and without sildenafil
- Packaging: 10 capsules
Natural alternatives versus Viagra and Kamagra: what are the differences?
Viagra and Kamagra contain sildenafil citrate, a PDE5 inhibitor that immediately and significantly increases blood flow to the penis. The effect occurs within 30 to 60 minutes and lasts 4 to 6 hours. However, sildenafil is contraindicated when used with nitrates (nitroglycerin medication for heart conditions), certain antihypertensives, and in cases of severe liver or kidney failure. It is precisely for this reason that it is prescription-only.
Natural alternatives such as the products listed above have a milder, broader range of effects. They are not suitable as a replacement for clinically diagnosed erectile dysfunction, but can have a noticeable effect in cases of functional libido issues, stress, or fatigue. The absence of sildenafil makes them safer to combine with most common medications, though caution is still advised when taking blood thinners and blood pressure-lowering medications.
Use and Dosage: General Guidelines
Most products in this category work best on an empty or half-full stomach. A heavy meal significantly slows the absorption of the active ingredients. Alcohol, in larger quantities, reduces effectiveness and, with some formulas, increases the risk of side effects such as dizziness or low blood pressure. Stick to the recommended dosage on the packaging: taking more rarely provides a greater effect and increases the risk of unwanted reactions such as heart palpitations or stomach upset.
Some products, such as Big Boy Golden XXL, are designed for daily use over a longer period. Others, such as Camagra Man or Sex-E, are intended as a one-time booster immediately before activity. Do not combine two libido products at the same time without comparing the package inserts.
Frequently Asked Questions About Natural Sexual Stimulants
Are these products safe for people with heart conditions?
If in doubt, always consult a doctor. L-Arginine can lower blood pressure at higher doses, which is undesirable when combined with certain heart medications. Products based on Tribulus Terrestris are not recommended for hormone-sensitive conditions. Most herbal formulas are significantly safer than sildenafil for heart patients, but that does not mean they are risk-free.
How quickly do these products work?
Liquids such as Sex Opium Liquid generally work faster than capsules—think 20 to 40 minutes when taken on an empty stomach. Capsules take an average of 45 to 60 minutes to produce a noticeable effect. Course products like Big Boy Golden XXL only work after several weeks of consistent use. The exact onset time varies by person, depending on metabolism, weight, and stomach contents.
Can I combine these products with alcohol?
Limited consumption—one to two glasses—has no significant effect on the efficacy of most products. Larger amounts of alcohol reduce blood flow effects, dampen sexual response, and, with some formulas, increase the risk of side effects such as dizziness or low blood pressure. This combination is not recommended.
Are there products specifically for women?
Yes, Camagra Woman is specifically formulated for women, with ingredients that support sensitivity and blood flow in the genital area. Sex Opium Liquid, Libido Liquid, and Sex-E 4 caps are suitable for both men and women. The full range can be found in the sex stimulants category.
About the author
Editor
Derek writes for Dutch Smart about smart shop products, cultivation techniques, and harm reduction. He combines practical experience with factual, evidence-based information, without hype or vague promises.
