Vidamax
✅ Treats erectile dysfunction
✅ Long duration — up to 36 hours
✅ Improves penile blood flow
✅ Also helps BPH urinary symptoms
✅ On-demand or daily low-dose options
Vidamax contains Tadalafil.
✓ Medically reviewed by Morgan Ellis — Pharmacy Researcher · 8 years experience · Last reviewed: May 2026
⚡ Quick Answer — What is Vidamax?
Vidamax is tadalafil 20 mg, a long-acting PDE5 inhibitor used for erectile dysfunction and benign prostatic hyperplasia (BPH) symptoms. Onset is around 30 minutes and effect lasts up to 36 hours — the longest window of any ED medication. Typical on-demand dose: 10–20 mg before activity. Never combine with nitrates (life-threatening hypotension).
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Vidamax is a tadalafil 20 mg tablet used to treat erectile dysfunction (ED) and benign prostatic hyperplasia (BPH). Each tablet delivers the same active ingredient as premium brands such as Cialis and Tadacip — at a significantly more affordable generic price. What sets tadalafil apart from other ED medications is its long duration of action: a single Vidamax tablet can provide responsiveness for up to 36 hours, which is why tadalafil is often nicknamed “the weekend pill”.
Vidamax works by relaxing the smooth muscle of the penile blood vessels, allowing blood to flow in during sexual stimulation and producing a firmer, more sustained erection. Because the window of effect is so long, Vidamax is especially popular among men who want spontaneity without the strict timing required by shorter-acting ED drugs.
What Is Vidamax?
Vidamax is an Indian-manufactured generic of tadalafil, a selective phosphodiesterase type 5 (PDE5) inhibitor. Tadalafil was approved by the FDA in 2003 and has since been studied in hundreds of clinical trials. It is listed on the WHO Model List of Essential Medicines and is one of the most widely prescribed ED treatments in the world.
Vidamax is commonly prescribed for:
- Erectile dysfunction — difficulty achieving or maintaining an erection sufficient for intercourse
- Benign prostatic hyperplasia (BPH) — urinary symptoms from an enlarged prostate
- ED and BPH together — one of the few ED medications licensed for dual use
- Pulmonary arterial hypertension (at a different dose, under the brand name Adcirca)
How Does Vidamax Work?
Tadalafil belongs to the PDE5 inhibitor class, which also includes sildenafil (Viagra, Vigamax) and vardenafil (Levitra). Here is the mechanism step by step:
- Sexual stimulation triggers the release of nitric oxide (NO) in the erectile tissue
- Nitric oxide increases the production of cyclic guanosine monophosphate (cGMP)
- cGMP relaxes the smooth muscle of the corpus cavernosum, letting blood flow in and producing an erection
- The enzyme PDE5 normally breaks down cGMP, ending the erection
- Tadalafil blocks PDE5, letting cGMP accumulate and extending the erection response
Compared with sildenafil, tadalafil has a much longer half-life (17–18 hours vs 3–5 hours). That is why its effect lasts roughly 36 hours versus 4–6 hours for sildenafil. Onset is typically 30–45 minutes, with peak plasma concentration reached in 2 hours. Food and alcohol affect tadalafil less than sildenafil — a key practical advantage.
Uses and Indications
- On-demand ED treatment — a single tablet taken ahead of anticipated sexual activity
- Daily low-dose ED management — tadalafil 2.5–5 mg taken every day for spontaneous responsiveness (not usually the 20 mg dose)
- Mild-to-moderate BPH — reduces urinary urgency, frequency, weak stream, and incomplete emptying
- ED secondary to diabetes, prostate surgery, or antidepressants — tadalafil has strong efficacy data in these groups
- Performance-anxiety-related ED — helps break the cycle of anticipatory anxiety
Vidamax Dosage and Administration
| Scenario | Recommended Dose | Timing |
|---|---|---|
| On-demand ED (standard starting dose) | 10 mg (half a Vidamax tablet) | 30 minutes before sexual activity |
| On-demand ED (standard effective dose) | 20 mg (one Vidamax tablet) | 30–60 minutes before sexual activity |
| Daily ED or ED + BPH | 2.5–5 mg once daily (split the tablet carefully) | Same time each day |
| BPH alone | 5 mg once daily | Same time each day |
| Mild–moderate renal impairment | Start at 5 mg; max 10 mg | On-demand only |
| Severe renal impairment | 10 mg maximum, every 72 hours | Specialist supervision |
| Mild–moderate hepatic impairment | Max 10 mg daily | On-demand only |
| Maximum frequency | 20 mg | No more than once per 24 hours |
How to Take Vidamax Properly
- Swallow the tablet whole with a glass of water
- Can be taken with or without food — unlike sildenafil, fatty meals do not significantly affect onset
- Effects begin within 30 minutes and last up to 36 hours
- Vidamax does not cause an erection on its own — sexual stimulation is required
- Do not take more than one tablet in 24 hours, even if the first dose did not produce the desired effect
- Alcohol in moderation does not interact significantly, but heavy alcohol use reduces erection quality and increases the risk of orthostatic hypotension
- Avoid grapefruit and grapefruit juice — they can raise tadalafil blood levels
Side Effects of Vidamax
| Severity | Side Effect |
|---|---|
| Common (≥1 in 10) | Headache, flushing, nasal congestion, indigestion, back pain, muscle pain (typical onset 12–24 hours after the dose) |
| Uncommon | Dizziness, blurred vision, chest discomfort, tachycardia, reflux, mild rash |
| Rare but serious | Priapism (painful erection lasting over 4 hours), sudden hearing loss, non-arteritic anterior ischaemic optic neuropathy (NAION), severe hypotension, myocardial infarction, stroke |
Seek emergency care immediately if you experience:
- An erection lasting more than 4 hours — untreated priapism can cause permanent damage
- Sudden vision loss or changes in one or both eyes
- Sudden hearing loss, often with ringing in the ears or dizziness
- Chest pain during or after sexual activity
- Severe dizziness or fainting
Warnings and Precautions
- Absolute contraindication with nitrates: Vidamax must never be combined with any nitrate medication (glyceryl trinitrate, isosorbide mononitrate/dinitrate, amyl nitrite / “poppers”). The combination can cause a catastrophic drop in blood pressure
- Cardiovascular risk: sexual activity itself is an exertion. Men with unstable angina, recent heart attack, severe heart failure, or uncontrolled arrhythmia should discuss ED therapy with a cardiologist
- Alpha-blocker caution: combining Vidamax with alpha-blockers (tamsulosin, doxazosin) can cause orthostatic hypotension; start low and titrate carefully
- Kidney and liver impairment: dose adjustments are required
- Priapism risk factors: sickle cell disease, leukaemia, multiple myeloma, or anatomical deformity of the penis — use with caution
- Hearing and vision loss: rare but reported; patients with optic neuropathy or prior sudden hearing loss should avoid tadalafil
- Not for use in women or men under 18
Drug Interactions
| Drug / Class | Interaction |
|---|---|
| Nitrates (isosorbide, nitroglycerin, “poppers”) | Absolutely contraindicated — risk of severe hypotension |
| Alpha-blockers (tamsulosin, doxazosin) | Additive hypotension — start tadalafil at the lowest dose |
| Guanylate cyclase stimulators (riociguat) | Contraindicated — severe hypotension risk |
| Strong CYP3A4 inhibitors (ketoconazole, itraconazole, ritonavir, clarithromycin) | Raise tadalafil levels — use 10 mg max, no more than once every 72 hours |
| CYP3A4 inducers (rifampicin, carbamazepine, phenytoin, St John’s wort) | Lower tadalafil levels — the effect may be reduced |
| Other PDE5 inhibitors | Do not combine — no additional benefit, higher side-effect risk |
| Antihypertensives | Additive blood-pressure-lowering effect — usually mild, monitor |
| Alcohol | Moderate alcohol is acceptable; heavy drinking reduces efficacy and increases orthostatic hypotension |
Vidamax vs Other ED Medications
| Feature | Vidamax (Tadalafil) | Sildenafil (Viagra, Vigamax) | Vardenafil (Levitra) |
|---|---|---|---|
| Onset | 30 minutes | 30–60 minutes | 30 minutes |
| Duration | Up to 36 hours | 4–6 hours | 4–6 hours |
| Food effect | Minimal | Fatty meals delay onset | Fatty meals delay onset |
| Daily-use option | Yes (2.5–5 mg) | No | No |
| BPH indication | Yes | No | No |
Storage Instructions
- Store below 25 °C in a dry place
- Keep in the original blister pack until use
- Keep out of reach of children
- Do not use after the printed expiry date
Related ED Medications on MedsBase
- Vigamax 100 mg (Sildenafil) — the classic shorter-acting PDE5 inhibitor
- Vidalista (Tadalafil) — alternative tadalafil brand
- Sildalist — combined sildenafil + tadalafil tablet
- Cenforce — popular sildenafil brand
Frequently Asked Questions
How long does Vidamax last?
A single 20 mg Vidamax tablet can support erections in response to sexual stimulation for up to 36 hours after dosing. This does not mean you have an erection for 36 hours — it means you remain responsive to stimulation during that window.
Is Vidamax the same as Cialis?
Both contain tadalafil 20 mg and are therapeutically equivalent. Vidamax is the Indian-manufactured generic; Cialis is Eli Lilly’s original brand. Clinical efficacy is identical.
Can I take Vidamax every day?
Daily use is recommended only at lower doses (2.5–5 mg). The 20 mg dose is designed for on-demand use and should not be taken more than once every 24 hours.
Does Vidamax work on an empty stomach?
Yes — and it also works with food, including fatty meals. This is one of its main advantages over sildenafil, which can be delayed by heavy meals.
Can I drink alcohol with Vidamax?
Moderate drinking (1–2 standard drinks) is generally fine. Heavy drinking reduces erection quality and increases the risk of orthostatic hypotension and headache. Avoid mixing Vidamax with binge drinking.
Will Vidamax cause an erection without stimulation?
No. Tadalafil enhances the natural erectile response but requires sexual stimulation to produce an erection. It is not a “trigger” medication.
Can I take Vidamax with blood-pressure medication?
In most cases, yes — most antihypertensives are compatible. The exceptions are nitrates (absolutely contraindicated) and alpha-blockers (use with care, start at the lowest Vidamax dose). Share your full medication list with your prescriber before starting.
What if Vidamax does not work the first time?
Give it a fair trial — most guidelines suggest at least 4–8 separate attempts before concluding the drug has failed. Optimise the dose, timing, and environment. If still unsuccessful, discuss a different medication or a urology referral with your doctor.
Can I split the 20 mg tablet?
Yes — the tablet is typically scored. Splitting lets you use the 10 mg dose for a lower starting dose or the 5 mg dose for daily use. Use a clean tablet splitter for a consistent cut.
Is Vidamax safe with diabetes or heart disease?
For most men with well-controlled diabetes or stable cardiovascular disease, yes. Men with unstable angina, recent myocardial infarction, severe heart failure, or uncontrolled arrhythmia should discuss ED therapy with a cardiologist first.
More options in Tadalafil
Ranked by recent MedsBase order volume — what other customers in this category are picking.
| Strength | 20 mg |
|---|---|
| Quantity | 30 Tablet/s, 60 Tablet/s, 90 Tablet/s, 180 Tablet/s |
Vidamax
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