ZENKAI ED
ED medication.
Prescribed online.
Delivered discreetly.
Licensed US physicians prescribe sildenafil, tadalafil, and avanafil online. Generic Viagra from $49/month. Generic Cialis daily from $59/month. 24-hour physician review. Plain packaging. Free shipping.
- Generic sildenafil (Viagra) or tadalafil (Cialis) — same drug, fraction of the cost
- Licensed US physician reviews within 24 hours
- Plain, discreet packaging — no branding, no logo
- No insurance required
- Cancel anytime · You only pay if prescribed
See If I Qualify — Free →
🔒 4-minute intake. HIPAA-secure. No charge if not prescribed.
ZENKAI ED — SELECT YOUR PLAN
Doctor-prescribed ED treatment
Choose your medication
Sildenafil (Generic Viagra) Most Popular
25/50/100mg · works in 30-60 min · lasts 4-6 hrs
$49
/month
Tadalafil As-Needed (Generic Cialis)
10/20mg · works up to 36 hours · "weekend pill"
$49
/month
Tadalafil Daily Best for Spontaneity
5mg daily · continuous readiness · no planning
$59
/month
Avanafil (Fastest Onset)
Works in 15 min · lowest side effects · premium
$79
/month
🔒 Discreet shipping · Cancel anytime · You pay only if prescribed
Your Options Explained
Which ED medication is right for you?
All four are PDE5 inhibitors — the same proven mechanism. The difference is speed, duration, and how you like to live.
Sildenafil — As-Needed
Generic Viagra. Take 30–60 minutes before. Works for 4–6 hours. The most prescribed ED drug in the world. Highly effective at 50–100mg. Best if you have predictable timing.
Tadalafil — As-Needed
Generic Cialis. Take 30 minutes before. Works for up to 36 hours — the "weekend pill." No need to plan precisely. Take Friday, be ready all weekend. Very well tolerated.
Tadalafil Daily 5mg
Daily low-dose Cialis. Take every morning. Continuously ready, no planning required. Also treats benign prostatic hyperplasia (BPH). Best for men who want spontaneity.
Avanafil — Fastest
Stendra generic. Works in as little as 15 minutes. Fewer food and alcohol interactions. Fewer side effects than sildenafil. Premium option for men who want the fastest, cleanest experience.
Proven effectiveness
PDE5 inhibitors are effective for approximately 70–80% of men with erectile dysfunction. They work by increasing blood flow to the penis — requiring sexual stimulation to activate.
Generic = brand drug
Generic sildenafil is the same molecule as Viagra. Generic tadalafil is the same as Cialis. Identical active ingredient, identical efficacy, at a fraction of the brand price.
ZENKAI vs. The Competition
How ZENKAI ED compares to Hims and Ro.
What you getZENKAIHimsRo
Generic sildenafil (Viagra)$49/mo$19/mo prepay$34/mo prepay
Generic tadalafil daily (Cialis)$59/moLimitedAvailable
Avanafil (fastest onset)✓ $79/mo✗ Not offered✗ Not offered
Month-to-month (no prepay)✓ Yes3–12 mo upfront3 mo upfront
Bundle with TRT✓ Yes — ZENKAI Men✗ No TRT offered✗ No TRT offered
Physician review in 24 hrs✓ Yes✓ Yes✓ Yes
Plain discreet packaging✓ Yes✓ Yes✓ Yes
The Process
ED prescription in 3 steps.
1
4-minute intake
Answer health questions online. No embarrassing clinic visit. Completely private and HIPAA-secure.
2
Physician review
A US-licensed physician reviews your intake within 24 hours and prescribes the right medication and dose.
3
Discreet delivery
Ships from an FDA-regulated pharmacy in plain packaging. No logo, no branding. Free shipping. 3–5 days.
4
Ongoing care
Physician available for questions, dose adjustments, and monthly refills. Cancel or pause anytime.
Patient Stories
Physician-led men’s health.
"I'd been avoiding this for two years because I didn't want to talk to my doctor about it. The ZENKAI intake was completely private. Approved in 16 hours. Tadalafil daily changed my life."
"I was paying $65/pill for brand Viagra. ZENKAI sildenafil is $49 for the whole month. Same drug, same results. Should have done this years ago."
"Turns out my ED was partly from low testosterone. ZENKAI put me on TRT and sildenafil together. Two months later I don't even need the sildenafil most of the time. Incredible outcome."
Frequently Asked Questions
ED treatment — your questions answered.
Can I get Viagra or Cialis online without visiting a doctor?
Yes. ZENKAI connects you with a US-licensed physician who reviews your intake online. If clinically appropriate, they prescribe sildenafil (generic Viagra) or tadalafil (generic Cialis) and your medication ships free in discreet packaging within 3–5 days.
What is the difference between sildenafil and tadalafil?
Sildenafil (generic Viagra) works for 4–6 hours and is taken as-needed 30–60 minutes before. Tadalafil (generic Cialis) lasts up to 36 hours and can also be taken daily at 5mg for continuous readiness with no timing required. Avanafil works fastest, in as little as 15 minutes.
Is ZENKAI cheaper than Hims for ED?
Hims ED starts at $19/month but requires prepayment of 3–12 months upfront. ZENKAI is $49/month with zero upfront commitment — pay monthly, cancel anytime. ZENKAI also offers avanafil, which Hims does not.
Will ED medication interfere with my other medications?
PDE5 inhibitors can interact with nitrates (used for heart conditions) and some blood pressure medications. Your ZENKAI physician reviews your full medication list before prescribing to ensure safety.
Can I bundle ED treatment with TRT?
Yes — and this is very common. Low testosterone and ED frequently coexist. ZENKAI physicians coordinate both protocols in a single plan. Many patients find that addressing low T reduces ED severity significantly on its own.
Is the packaging really discreet?
Completely. Your medication ships in plain, unbranded packaging with no visible indication of contents or company name on the outside of the box or envelope. The return address is a neutral fulfillment address.
ED treatment. Private. Tonight.
4-minute intake. Physician approval in 24 hours. Free discreet shipping. You only pay if prescribed.
See If I Qualify — Free →🔒 HIPAA-secure · Plain packaging guaranteed