8 mg daily, against an approved ceiling of 5

Daily low-dose tadalafil is one of the better ideas in erectile dysfunction treatment. Instead of taking something before sex, you take a small dose every day, reach a steady blood level, and are simply covered — no planning, no timing, no clock. It is approved, it is well evidenced, and it treats prostate symptoms at the same time. Our daily versus on-demand comparison sets out when it makes sense.

This is not the same as saying 8 mg is dangerous. Men routinely take 10 or 20 mg of tadalafil on demand, and those are approved doses. The difference is accumulation. Tadalafil has a half-life of roughly seventeen and a half hours, so a daily dose builds towards a steady level over about five days — which is the entire point of daily dosing. Take a higher dose daily and the level it steadies at is correspondingly higher, and that steady state at 8 mg is not a scenario anyone has run a trial on.

The DHEA half: banned in sport, thin on evidence

DHEA is a hormone your adrenal glands produce, and it acts as a precursor your body can convert into testosterone and oestrogen. Levels decline with age, which is the basis of the pitch: top up the precursor, support testosterone, improve sexual function. It is sold over the counter in the US as a dietary supplement.

What the evidence on DHEA for erectile function actually says
SourceFinding
A double-blind, randomised, placebo-controlled trial (1999)DHEA treatment was associated with improvement in erectile function scores, with no change in PSA, prolactin, testosterone, prostate volume or postvoid residual
Endocrine Society positionThere is no strong evidence supporting the use of DHEA for sexual dysfunction
Typical study dose50 to 100 mg daily — the 50 mg here sits at the bottom of that range
Where any benefit is most plausibleMen with documented low DHEA-S, rather than as a general addition
One small positive trial from the 1990s against a professional body's assessment that the evidence is not strong. Both are true, and the second is the one to weight.

There is also a structural argument against bundling. Combining a well-evidenced prescription drug with a weakly-evidenced hormone precursor in one chewable means you cannot tell which is doing anything, cannot adjust one without the other, and cannot stop the DHEA while keeping the tadalafil. If you want to try DHEA, it is sold separately for $10 to $25 a month — and buying it separately keeps the two decisions separable. Our supplements evidence review covers the wider category.

What the same thing costs done conventionally

Daily cover, three ways
OptionTadalafil doseCostStatus
Generic daily tadalafil2.5–5 mg (approved)$20–$40 per 90 daysFDA-approved generic
Rugiet Daily Boost8 mg (above approved)Not published — ask at intakeCompounded
Generic tadalafil + separate DHEA2.5–5 mg (approved)$20–$40 per 90 days plus $10–$25 a monthApproved drug plus OTC supplement
The third row is the honest reconstruction of this product from parts — at the approved dose, with the two decisions kept separate. Model it with the cost calculator.

That third row is worth sitting with. If what appeals to you about Daily Boost is continuous cover plus a testosterone-support ingredient, you can have exactly that using an FDA-approved tablet at the approved dose and an over-the-counter supplement — keeping the ability to stop one without the other, and without a compounded product carrying a tadalafil dose nobody has studied in daily use.

Who this suits, and who should not touch it

It might suit you if
You want continuous cover, you dislike swallowing tablets, you have discussed the 8 mg dose with a clinician who knows your cardiac and kidney history, and you are not tested in sport.
Choose generic daily tadalafil instead if
You want the evidenced thing at the approved dose for a fraction of the price. This describes most people, and it is what our daily-dosing comparison points to.
Do not take it if
You are tested in sport — DHEA is prohibited at all times. You take nitrates in any form. You have prostate disease or a hormone-sensitive cancer. Or you have significant renal impairment, where the label restricts daily tadalafil dosing.
Talk to a clinician first if
You take an alpha-blocker, several blood-pressure medications, anticoagulants or diabetes medication, or you have any cardiac history. See sex after a heart attack.
FAQ

Frequently asked questions

What is in Rugiet Daily Boost?
8 mg of tadalafil and 50 mg of DHEA, in a cinnamon-flavoured chewable taken once daily. Credit where it is due: unlike Rugiet Ready, this product publishes its doses, so you know exactly what you are taking.
Is 8 mg of tadalafil a normal daily dose?
No — it is above the approved ceiling. The label starts once-daily dosing for ED at 2.5 mg and increases to 5 mg based on efficacy and tolerability. 8 mg is sixty per cent above that, taken every day in a drug that accumulates to steady state over about five days. Compounding makes it lawful; no trial has studied 8 mg in continuous use. Ask your prescriber directly why 8 rather than 5.
Will DHEA make me fail a drug test?
Yes, if you are tested in sport. DHEA is on the WADA Prohibited List under S1, Anabolic Agents, and is banned at all times — in and out of competition. It is legally sold as a supplement in the US, which is precisely why athletes get caught by it.
Does DHEA actually help erectile dysfunction?
The evidence is thin. One small double-blind, placebo-controlled trial from the 1990s found improvement in erectile function scores, with no change in testosterone, PSA or prolactin. The Endocrine Society's position is that there is no strong evidence supporting DHEA for sexual dysfunction. Any benefit is most plausible in men with documented low DHEA-S rather than as a general addition.
Who should avoid DHEA?
Anyone with prostate disease or a hormone-sensitive cancer — it is a precursor to sex hormones, which is exactly the wrong thing to add. Raise it with a clinician if you take anticoagulants or diabetes medication. Treat it as a hormone, not a vitamin.
How much does it cost?
The per-dose price is not published on the product page. The company states that consultation, prescription and unlimited provider follow-ups are included with no additional fees. Confirm the per-dose rate and the renewal price at intake. For scale, generic daily tadalafil at the approved 2.5–5 mg is $20 to $40 for ninety days.
Can I just buy the parts separately?
Yes, and there is a good argument for it. Generic daily tadalafil at the approved dose is $20 to $40 for ninety days, and DHEA is sold over the counter for $10 to $25 a month. Keeping them separate means you can stop one without the other and adjust either — which a single chewable does not allow.
How long before I can take nitrates?
Because this contains tadalafil, assume at least 48 hours — and on daily dosing you never really clear it, so daily tadalafil is not appropriate at all for anyone who might need emergency nitrates. Tell any treating clinician exactly what you take.
Sources

What this is based on

We link to primary sources — clinical guidelines, regulator publications and peer-reviewed research — wherever possible. Links open on third-party sites we do not control.

  1. [01]U.S. Food and Drug Administration. Compounding and the FDA: Questions and Answers.
  2. [02]U.S. Food and Drug Administration. Drugs@FDA — approved drug products and prescribing information.
  3. [03]American Urological Association. Erectile Dysfunction: AUA Guideline (2018).
  4. [04]Endocrine Society. Testosterone Therapy in Men With Hypogonadism — clinical practice guideline (2018).
  5. [05]National Library of Medicine. PubMed — search the primary literature.