Why Chewable Form Means Faster Onset
The onset advantage of Kamagra Soft over a standard sildenafil tablet comes from the combination of buccal mucosal absorption during chewing and faster gastric dissolution of the broken-down tablet fragments.
Sildenafil vs Other ED Formulations — Key Parameters
Duration of Effect — 4 to 6 Hours
Flavours Available
Flavours are designed to make the chewable format more palatable and to enable discrete administration without water. Chew thoroughly until dissolved, then swallow. Do not swallow the tablet whole — this defeats the purpose of the chewable format and reduces the onset advantage.
What Is Kamagra Soft? — Mechanism of Action
Sildenafil citrate is a selective PDE5 (phosphodiesterase type 5) inhibitor (Ki = 3.9 nM). During sexual stimulation, nitric oxide (NO) is released in the corpus cavernosum of the penis, activating guanylate cyclase and elevating cyclic GMP (cGMP). Elevated cGMP relaxes the smooth muscle of the cavernosal arteries, increasing arterial inflow and producing an erection.
PDE5 normally degrades cGMP, terminating the erection. Sildenafil competitively inhibits PDE5, preventing cGMP breakdown and sustaining the vasodilatory response. The result is a firm and lasting erection in the presence of sexual stimulation. Sexual arousal is essential — sildenafil does not produce spontaneous erections.
Sildenafil also inhibits PDE6 (expressed in retinal photoreceptors) at higher plasma concentrations, which is the pharmacological basis for the mild, transient visual side effects (blue tinge, photophobia) occasionally reported with sildenafil but not with tadalafil or vardenafil.
Dosage and How to Take
- Chew one 100mg tablet thoroughly before swallowing — do not swallow whole
- Take 20–30 minutes before anticipated sexual activity; some men may need up to 60 minutes
- Do not exceed one 100mg tablet per 24-hour period
- No water is required, but a small amount may assist swallowing after chewing
- For best results, take on an empty stomach or after a light meal only — high-fat meals delay onset by up to 60 minutes and reduce peak concentration by ~29%
- Avoid excessive alcohol — more than 2 standard drinks increases the risk of hypotension and impairs erectile function independently of medication
- If 100mg is well-tolerated but the effect is insufficient, consult a GP — dose reduction or an alternative formulation may be appropriate; do not exceed 100mg per day
- Patients with moderate to severe hepatic impairment or severe renal impairment (CrCl <30 mL/min) should seek medical advice — dose reduction to 25mg may be necessary
Critical Safety Information — Nitrates Interaction
Note — nitrate window vs tadalafil: The mandatory safety gap for sildenafil is 24 hours. For tadalafil (Cialis, Cialis Super Active), the required gap is longer at 48 hours, due to tadalafil's longer half-life of ~17.5 hours vs sildenafil's 3–5 hours. If you take any nitrate medication regularly for angina or heart disease, consult your GP or cardiologist before using any PDE5 inhibitor.
Also absolutely contraindicated with: Riociguat (Adempas). Combination with alpha-blockers (tamsulosin, doxazosin, alfuzosin) may cause symptomatic hypotension — use with caution and only under medical guidance.
Side Effects
Common side effects (≥1/100)
- Headache (most common, dose-related)
- Flushing — facial warmth and redness
- Nasal congestion or rhinitis
- Dyspepsia (indigestion)
- Dizziness
- Visual disturbances — mild, transient blue tinge to vision (cyanopsia), increased light sensitivity or blurred vision. Sildenafil-specific, due to PDE6 inhibition in retinal photoreceptors. Typically brief and resolves without intervention
Serious — seek immediate medical attention
- Priapism — painful erection lasting more than 4 hours. Medical emergency. If not treated promptly, can cause permanent erectile dysfunction
- Sudden loss or significant decrease in vision — possibly associated with non-arteritic anterior ischaemic optic neuropathy (NAION). Risk is higher in men with pre-existing vascular risk factors
- Sudden decrease or loss of hearing, with or without tinnitus or dizziness
- Severe hypotension — especially if taken with nitrates, alpha-blockers or large amounts of alcohol
Note on visual side effects: Sildenafil inhibits PDE6 in addition to PDE5. PDE6 is expressed in retinal rod photoreceptors and plays a role in phototransduction. Inhibition at higher plasma concentrations produces mild, reversible visual changes — a bluish tinge to vision (cyanopsia), photophobia or mild blurring — typically within 1–2 hours of dosing and resolving within 4 hours. These effects are not seen with tadalafil or vardenafil, which are more selective for PDE5. If visual disturbances are prolonged or severe, discontinue use and seek medical advice.
Drug Interactions
| Drug / substance | Interaction | Action required |
|---|---|---|
| Organic nitrates (GTN, isosorbide, poppers) | Severe hypotension — potentially fatal | Absolute contraindication — 24h gap minimum |
| Riociguat (Adempas) | Severe hypotension | Absolute contraindication |
| Alpha-blockers (tamsulosin, doxazosin, alfuzosin) | Symptomatic hypotension possible | Caution; medical advice required; start at 25mg |
| Antihypertensives (any class) | Additive blood pressure reduction | Monitor; medical advice recommended |
| CYP3A4 inhibitors (ketoconazole, ritonavir, erythromycin, grapefruit) | Increased sildenafil plasma levels | Reduce dose to 25mg; avoid grapefruit |
| CYP3A4 inducers (rifampicin, carbamazepine) | Reduced sildenafil efficacy | Dose adjustment may be needed; consult GP |
| Other PDE5 inhibitors | Additive effect — increased adverse event risk | Do not combine |
| Alcohol (>2 standard drinks) | Additive hypotension; impairs erectile function | Limit alcohol intake when using sildenafil |
Contraindications
- 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 recent 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
- Patients with hereditary degenerative retinal disorders, including retinitis pigmentosa (PDE6 involvement)
- Patients who have previously experienced NAION (non-arteritic anterior ischaemic optic neuropathy)
- Patients under 18 years of age
- Women and children
- Hypersensitivity to sildenafil or any excipient
Manufacturer and Quality Standards
Kamagra Soft is manufactured by Ajanta Pharma Ltd. — an Indian pharmaceutical company holding WHO Good Manufacturing Practice (GMP) certification and US FDA facility approval. Ajanta Pharma is the originator of the Kamagra brand and supplies to regulated markets internationally. The product contains sildenafil citrate equivalent to 100mg sildenafil, the same active ingredient as Viagra® (Pfizer).
Kamagra Soft is imported into Australia under the TGA Personal Importation Scheme. For full details, refer to tga.gov.au/personal-importation.
Frequently Asked Questions
How is Kamagra Soft different from standard Kamagra (Kamagra 100mg tablet)?
The active ingredient and dose are identical — sildenafil citrate 100mg. The difference is the formulation. Kamagra Soft is chewed rather than swallowed whole, allowing partial buccal mucosal absorption and faster gastric dissolution of the chewed fragments. This produces an onset of 20–30 minutes compared to 45–60 minutes for the standard tablet. Duration of effect is the same: 4–6 hours.
Can I take Kamagra Soft with food?
You can, but food — especially a high-fat meal — significantly reduces sildenafil absorption. A fatty meal can reduce peak plasma concentration by ~29% and delay onset by up to 60 minutes. For fastest, most reliable onset, take Kamagra Soft on an empty stomach or at least 2 hours after a heavy meal.
How does Kamagra Soft compare to Cialis Super Active for longer encounters?
The key difference is duration. Sildenafil (Kamagra Soft) lasts 4–6 hours, while tadalafil (Cialis Super Active SGC) lasts up to 36 hours. Tadalafil is also unaffected by food. Sildenafil has a shorter nitrate safety window (24h vs 48h for tadalafil). For spontaneous activity over an extended period, tadalafil may be preferable. For planned shorter encounters where fastest available onset is desired, either formulation is appropriate.
Why do I sometimes see a slight blue tinge to my vision after taking sildenafil?
This is a known and benign side effect specific to sildenafil. At higher plasma concentrations, sildenafil inhibits PDE6 — an enzyme in retinal photoreceptors involved in visual signal processing. This produces a mild, transient bluish tint to vision (cyanopsia) or increased light sensitivity. It is dose-related, temporary, and resolves as plasma levels fall. It does not occur with tadalafil or vardenafil. If visual changes are severe or prolonged, discontinue and seek medical attention.
Is 100mg always the right starting dose?
Not necessarily. Sildenafil is also available in 25mg and 50mg strengths. The 100mg dose in Kamagra Soft is the maximum recommended single dose. Men over 65, those with hepatic or renal impairment, or those on CYP3A4 inhibitors may be better served by a lower starting dose. Consult a GP or telehealth provider to determine the most appropriate dose for your individual circumstances.
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 for general guidance only and does not constitute personal medical advice. Consult your doctor or pharmacist before commencing any new medication. Sildenafil is a Schedule 4 medicine under the Australian Poisons Standard when purchased within Australia.
