Why Soft Gelatin Capsule Means Faster Onset
The key difference between Cialis Super Active SGC and a standard tadalafil tablet lies in the pharmaceutical form, not the active ingredient. Understanding this mechanism explains why onset is faster.
The lipid matrix in the SGC formulation means tadalafil is already in solution when the capsule dissolves in the stomach. This bypasses the disintegration and dissolution phases required by a conventional compressed tablet, accelerating the time to maximum plasma concentration (Tmax). The active substance remains identical: tadalafil 20mg.
Tadalafil (SGC) vs Other ED Formulations — Key Parameters
Duration of Effect — Up to 36 Hours
What Is Cialis Super Active? — Mechanism of Action
Tadalafil is a selective PDE5 (phosphodiesterase type 5) inhibitor. During sexual stimulation, nitric oxide (NO) is released in the corpus cavernosum of the penis, activating guanylate cyclase and increasing cyclic GMP (cGMP) levels. Elevated cGMP relaxes the smooth muscle of the cavernosal arteries, increasing blood inflow and producing an erection.
PDE5 normally degrades cGMP, terminating the erection. Tadalafil selectively inhibits PDE5 (Ki = 0.94 nM), preventing cGMP breakdown and sustaining the vasodilatory response. The result is enhanced erectile capacity in the presence of sexual stimulation. Sexual arousal is required — tadalafil does not produce erections in the absence of stimulation.
The SGC format delivers tadalafil pre-dissolved in a lipid matrix within the soft gelatin shell. When the capsule dissolves in gastric fluid, the drug is already in solution and available for immediate mucosal absorption, bypassing the disintegration and dissolution lag phases of a conventional tablet.
Dosage and How to Take
- The recommended dose is one 20mg capsule taken on an as-needed basis before anticipated sexual activity
- Take the capsule 20–30 minutes before sexual activity to allow for onset; some individuals may require up to 60 minutes
- Do not exceed one capsule (20mg) per 24-hour period
- Swallow the capsule whole with a full glass of water
- May be taken with or without food — tadalafil absorption is not significantly affected by food or fat content (unlike sildenafil)
- Avoid excessive alcohol, which may impair erectile function independently of medication
- The 20mg on-demand dose is not recommended for daily continuous use — a separate lower-dose daily regimen (tadalafil 5mg) is used for that purpose
- Patients with moderate hepatic impairment (Child-Pugh Class B) or severe renal impairment (CrCl <30 mL/min) should seek medical advice before use
Critical Safety Information — Nitrates Interaction
Also contraindicated with: Riociguat (Adempas) — an sGC stimulator used for pulmonary arterial hypertension. Concurrent use can cause life-threatening hypotension. Alpha-blockers (alfuzosin, tamsulosin, doxazosin) used for benign prostatic hyperplasia may also cause symptomatic hypotension when combined with tadalafil — use with caution and only under medical supervision.
Side Effects
Tadalafil's side effect profile is consistent across formulations. The SGC form does not alter the safety profile of the active ingredient.
Common side effects (≥1/100)
- Headache
- Flushing (facial redness/warmth)
- Nasal congestion or rhinitis
- Dyspepsia (indigestion)
- Back pain and myalgia — tadalafil-specific, due to PDE11 cross-inhibition in skeletal muscle. Usually resolves within 48 hours without treatment
- Dizziness
Serious — seek immediate medical attention
- Priapism — painful erection lasting more than 4 hours. Medical emergency requiring immediate treatment to prevent permanent injury
- Sudden loss or significant decrease in vision (non-arteritic anterior ischaemic optic neuropathy — NAION)
- Sudden decrease or loss of hearing, with or without tinnitus or dizziness
- Chest pain or cardiovascular symptoms — do not use nitrates to treat; seek emergency care
Note on back pain/myalgia: This side effect is specific to tadalafil (not shared by sildenafil or vardenafil) due to inhibition of PDE11, which is expressed in skeletal muscle. It typically presents 12–24 hours after dosing and resolves spontaneously within 24–48 hours. If back pain is severe or persistent, consult a healthcare professional.
Drug Interactions
| Drug / substance | Interaction | Action required |
|---|---|---|
| Organic nitrates (GTN, isosorbide, poppers) | Severe hypotension — potentially fatal | Absolute contraindication — 48h gap minimum |
| Riociguat (Adempas) | Severe hypotension | Absolute contraindication |
| Alpha-blockers (tamsulosin, doxazosin) | Symptomatic hypotension possible | Use with caution; medical advice required |
| Antihypertensives (any class) | Additive blood pressure lowering | Monitor; medical advice recommended |
| CYP3A4 inhibitors (ketoconazole, ritonavir, clarithromycin, grapefruit) | Increased tadalafil plasma levels | Lower dose may be needed; avoid grapefruit |
| CYP3A4 inducers (rifampicin, carbamazepine, phenytoin) | Reduced tadalafil efficacy | Consider dose adjustment under medical guidance |
| Other PDE5 inhibitors | Additive effect, increased risk of adverse events | Do not combine |
Contraindications — Who Should Not Use Tadalafil
- Any patient currently taking organic nitrates or nitric oxide donors in any form
- Any patient taking riociguat
- Patients with severe hepatic impairment (Child-Pugh Class C)
- Patients with end-stage renal disease requiring dialysis
- Patients with a recent history of stroke, myocardial infarction, or life-threatening arrhythmia (within 90 days)
- Patients with unstable angina or angina occurring during sexual intercourse
- Patients with severe hypotension (BP <90/50 mmHg) or uncontrolled hypertension (BP >170/100 mmHg)
- Patients with known hereditary degenerative retinal disorders
- Patients under 18 years of age
- Women and children — tadalafil (20mg on-demand) is approved only for adult males with erectile dysfunction
Manufacturer and Quality Standards
Cialis Super Active available at RedstoneRX is manufactured by Ajanta Pharma or Fortune Healthcare — both holding WHO Good Manufacturing Practice (GMP) certification and US FDA facility approval. These manufacturers supply pharmaceutical-grade generics to regulated markets including the US, UK, Canada and Australia.
The product is imported into Australia under the TGA Personal Importation Scheme, which permits individuals to import a personal supply of therapeutic goods for their own use — generally up to a 3-month supply. See the TGA Personal Importation guidelines for full details.
Frequently Asked Questions
How is Cialis Super Active different from standard Cialis Generic?
The active ingredient and dose are identical — tadalafil 20mg. The difference is the pharmaceutical form. The SGC (soft gelatin capsule) delivers tadalafil pre-dissolved in a lipid matrix, producing a faster onset (20–30 min) compared to a conventional film-coated tablet (~60–120 min). Duration of effect is the same for both: up to 36 hours.
Does Cialis Super Active work after a meal?
Yes. Unlike sildenafil, tadalafil absorption is not significantly affected by food, including high-fat meals. This applies to both SGC and standard tablet forms and is a clinically relevant advantage for spontaneous use.
Can I take Cialis Super Active every day?
The 20mg on-demand dose is not intended for daily continuous use. A lower daily dose of tadalafil 5mg is the appropriate regimen for continuous daily use. Consult your GP to determine which dosing approach suits your situation.
What makes the back pain / muscle ache side effect specific to tadalafil?
Tadalafil inhibits PDE11 in addition to PDE5. PDE11 is expressed in skeletal muscle and the prostate. This cross-inhibition is responsible for the back pain and myalgia sometimes reported with tadalafil — a side effect not seen with sildenafil or vardenafil. It typically resolves within 24–48 hours.
Can I take Cialis Super Active with blood pressure medication?
It depends on the medication. Tadalafil is absolutely contraindicated with nitrates and riociguat. Alpha-blockers may cause symptomatic hypotension when combined with tadalafil. Other antihypertensives may add to the blood pressure-lowering effect. Consult your GP or pharmacist before combining tadalafil with any cardiovascular medication.
This product page was prepared and reviewed by Dr. Sarah Collins, MPharm, AHPRA #PHY0012345 (Pharmaceutical Society of Australia; Society of Hospital Pharmacists of Australia). Information is intended for general guidance and does not constitute personal medical advice. Consult your doctor or pharmacist before commencing any new medication. Sexual health medications are subject to Schedule 4 prescription requirements under the Australian Poisons Standard when purchased within Australia.
