Mods Max base w/ 5mg Tadalafil, 2mg Apomorphine, 100iu Oxytocin
Mods Max base w/ 5mg Tadalafil, 2mg Apomorphine, 100iu Oxytocin is a prescriber-directed sexual health preparation. It should be used only after assessment of the patient's symptoms, medical history, cardiovascular risk, medication list, and treatment goals.
This compounded sublingual troche (melt) combines three complementary agents — tadalafil 5 mg, apomorphine 2 mg, and oxytocin 100 IU — in a mucoadhesive base designed for rapid buccal or sublingual absorption, bypassing hepatic first-pass metabolism. Each ingredient addresses a distinct physiologic pathway in sexual response: tadalafil enhances penile vasodilation via PDE5 inhibition, apomorphine facilitates central dopaminergic-mediated erectile initiation, and oxytocin modulates hypothalamic arousal signaling and promotes psychosocial bonding. Genesis Compounding prepares this as a prescription-only, patient-specific 503A compounded preparation for adult males with sexual dysfunction; this specific combination is not FDA-approved as a compounded product.
| Active Ingredient | Pharmacologic Role |
|---|---|
| Tadalafil 5 mg | Selective phosphodiesterase-5 (PDE5) inhibitor; prevents degradation of cGMP in cavernosal smooth muscle, sustaining nitric oxide–mediated vasodilation and facilitating penile engorgement during sexual stimulation. |
| Apomorphine 2 mg | Non-ergoline dopamine D1/D2 agonist; acts centrally at hypothalamic paraventricular nucleus neurons to activate the oxytocinergic and autonomic pathways initiating the erectile cascade — a mechanism independent of peripheral vascular effects. |
| Oxytocin 100 IU | Neuropeptide hormone; modulates hypothalamic arousal, desire, and partner-bonding circuits; facilitates smooth muscle relaxation and may enhance the responsiveness of central pro-erectile pathways to dopaminergic and serotonergic signaling. |
Sublingual/buccal troche (melt): Place the troche under the tongue or between the cheek and gum and allow it to dissolve completely — do not chew or swallow. Avoid eating, drinking, or smoking during dissolution (approximately 10–15 minutes). Transmucosal absorption allows apomorphine and oxytocin to reach the systemic circulation while significantly reducing GI first-pass metabolism, achieving faster onset than swallowed tablets. Administer 15–30 minutes before anticipated sexual activity, per prescriber direction. Do not exceed the prescribed dose in a 24-hour period.
All dosing is prescriber-determined based on patient response, cardiovascular status, and concomitant medications.
- On-demand use: One troche (or half troche as a starting test dose) sublingually 15–30 minutes before sexual activity.
- Apomorphine reaches peak plasma concentration in approximately 20–30 minutes via sublingual route; tadalafil's effect begins at 30–60 minutes and may persist up to 36 hours due to its long half-life, providing an extended window for spontaneous activity.
- No more than one troche per 24 hours.
- Final dose and frequency are determined solely by the prescribing clinician.
- Tadalafil 5 mg: Selectively inhibits PDE5 — the enzyme that degrades cyclic guanosine monophosphate (cGMP) in penile cavernosal smooth muscle cells. During sexual stimulation, nitric oxide (NO) released from endothelial cells and neurons activates guanylate cyclase, increasing cGMP. Elevated cGMP relaxes cavernosal smooth muscle, increases arterial inflow, and produces erection. Tadalafil prevents cGMP breakdown, sustaining and potentiating this response. Tadalafil's half-life of 17.5 hours allows activity over a 24–36 hour window.
- Apomorphine 2 mg: A centrally acting D1/D2 dopamine receptor agonist that preferentially stimulates neurons in the hypothalamic paraventricular nucleus (PVN). PVN stimulation activates oxytocinergic pathways projecting to the spinal cord, generating parasympathetic sacral outflow that initiates erection independent of peripheral vascular mechanisms. This central mechanism is complementary to — and can be synergistic with — tadalafil's peripheral vasodilatory effect. Onset via sublingual route is approximately 15–20 minutes.
- Oxytocin 100 IU: Released from the posterior pituitary and hypothalamic neurons, oxytocin modulates central arousal and bonding circuits. It facilitates the central pro-erectile signaling initiated by dopamine agonism, may potentiate nitric oxide release locally, and modulates serotonergic and dopaminergic neurotransmission pathways integral to sexual desire and arousal. Oxytocin is metabolized rapidly (half-life 1–6 minutes IV; sublingual bioavailability is lower but pharmacodynamic effects are reported).
Clinical context: This multi-mechanism formulation is intended for adult males with erectile dysfunction (ED) who have had suboptimal response to PDE5 inhibitor monotherapy, particularly those with a significant psychogenic or neurogenic component to their ED — in whom central dopaminergic and oxytocinergic augmentation adds therapeutic value beyond peripheral vasodilation alone. It may also be appropriate for patients seeking to restore both physiologic function and emotional/relational intimacy.
Prescriber monitoring:
- Baseline cardiovascular evaluation — tadalafil is contraindicated with nitrates and guanylate cyclase stimulators
- Blood pressure monitoring — apomorphine can cause hypotension and vasovagal syncope
- Detailed medication reconciliation — apomorphine is specifically contraindicated with 5-HT3 antagonists (ondansetron, granisetron) due to documented life-threatening hypotension
- Liver and renal function in patients with hepatic or renal impairment (tadalafil dose reduction may be required)
- Monitor for priapism — erection lasting >4 hours requires immediate medical attention
Contraindications:
- Concurrent nitrates or guanylate cyclase stimulators (e.g., riociguat) — severe hypotension risk (tadalafil)
- Concurrent 5-HT3 antagonists (ondansetron, granisetron, palonosetron) — potentially fatal hypotension/syncope with apomorphine
- Severe hepatic impairment (Child-Pugh class C)
- Unstable angina, recent MI (<90 days), uncontrolled hypertension or severe hypotension
- Hypersensitivity to any component
Warnings & Precautions:
- Vasovagal syncope with apomorphine: most commonly occurs at first use; instruct patients to take while seated and be aware of prodromal symptoms (nausea, sweating)
- Priapism: erections lasting >4 hours are a urologic emergency — instruct patients to seek immediate care
- Visual disturbances: PDE5 inhibitors rarely cause transient visual effects or NAION (non-arteritic anterior ischemic optic neuropathy); avoid in patients with known risk factors
- Hearing loss: rare cases reported with PDE5 inhibitors — discontinue if sudden hearing changes occur
Drug Interactions:
- Alpha-blockers: enhanced hypotension with tadalafil — use with caution
- Strong CYP3A4 inhibitors (ketoconazole, ritonavir): increase tadalafil exposure significantly
- 5-HT3 antagonists: contraindicated with apomorphine
Common Side Effects: Headache, flushing, nasal congestion, back pain (tadalafil); nausea, dizziness, sweating (apomorphine — particularly at first use); skin flushing and mild transient emotional effects (oxytocin).
Store compounded troches at room temperature (15–25°C) in a moisture-resistant container, away from heat and light. Sublingual troches may be sensitive to humidity — store in a dry environment. Do not refrigerate or freeze unless specifically labeled for refrigeration. Observe the beyond-use date. Keep out of reach of children.
How is this different from just taking tadalafil (Cialis) alone?
Tadalafil works exclusively through peripheral vascular mechanisms (PDE5 inhibition). Apomorphine adds a central dopaminergic pro-erectile stimulus that works upstream — in the brain — to initiate erection before maximal vascular response. Oxytocin further augments central arousal and bonding. For men whose ED has psychogenic or central neurogenic components, this multi-pathway approach can achieve results where PDE5 inhibitor monotherapy has been insufficient.
How quickly does this preparation work?
Apomorphine via sublingual absorption produces a pro-erectile effect in approximately 15–20 minutes. Tadalafil's peripheral effect develops over 30–60 minutes but persists for up to 36 hours, allowing for spontaneous intimacy over an extended window.
Why shouldn't I take nausea medication (like ondansetron) with this?
5-HT3 antagonists such as ondansetron are specifically contraindicated with apomorphine — this combination has caused life-threatening hypotension and syncope. Even one-time use of ondansetron within the dosing window creates a serious safety risk. Discuss all anti-nausea medications with your prescriber before starting this preparation.
Is this FDA-approved?
Tadalafil is FDA-approved for erectile dysfunction; apomorphine is FDA-approved for Parkinson's disease (not ED) in the US; oxytocin is FDA-approved for obstetric indications. This specific compounded combination is a prescriber-directed, patient-specific 503A preparation and has not been evaluated by the FDA as a compounded product.
What should I do if I have an erection lasting more than 4 hours?
Seek emergency medical care immediately. Priapism (prolonged erection) can cause permanent erectile tissue damage if not treated promptly. Do not wait.
Clinical References
Authoritative sources reviewed in preparing this clinical summary. Provided for prescriber reference; not a substitute for the prescriber’s clinical judgment.