Cobra-120 (Sildenafil Citrate) — Patient-Friendly Information (Australia)

Cobra-120 contains sildenafil citrate, a medicine used to treat certain sexual health conditions and, in some situations, pulmonary arterial hypertension. This page explains how it works, what to expect, typical use, timing, food and alcohol interactions, possible side effects, safety tips, and practical information for buying and receiving your medicine in Australia.

Always read the Consumer Medicine Information (CMI) provided with your product and follow your healthcare professional’s advice. The information below is general and may not cover every personal situation.

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1) Basic product information

Product	Active ingredient	Strength	Common form
Cobra-120	Sildenafil citrate	120 mg	Oral tablets (typically)

Note on strengths: Cobra-120 is a higher strength (120 mg) formulation of sildenafil. Many people use lower strengths; however, suitability depends on your medical history, other medicines, and how your body responds. If you are unsure, check the strength you have against the dosing instructions provided with your product.

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2) What Cobra-120 is used for (indications)

Cobra-120 (sildenafil) may be used for the following conditions:

• Erectile dysfunction (ED): Helps men achieve and maintain an erection when sexually stimulated.
• Pulmonary arterial hypertension (PAH): In some patients, sildenafil is used to improve exercise capacity and reduce symptoms by relaxing blood vessels in the lungs. (This is usually under specialist guidance.)

If your product was supplied for ED, your main goal is improved erectile function with stimulation. If it was supplied for PAH, your goal is improved ability to exercise and manage symptoms.

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3) How Cobra-120 works (mechanism of action)

Sildenafil is a phosphodiesterase type 5 (PDE5) inhibitor. PDE5 normally breaks down cGMP, a chemical that supports smooth muscle relaxation.

In ED, when you are sexually stimulated, your body releases nitric oxide, which increases cGMP in the penis. Sildenafil helps keep cGMP levels higher for longer, promoting increased blood flow and supporting erection.

In PAH, sildenafil helps relax blood vessels in the lungs, reducing blood pressure in the pulmonary circulation.

Important: Sildenafil does not automatically cause an erection. It works best when sexual stimulation is present.

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4) Pharmacokinetics (how the body processes it)

Pharmacokinetics describe how sildenafil is absorbed, distributed, metabolised, and eliminated. While individual results vary, the following is a typical overview.

• Absorption: Sildenafil is absorbed after oral dosing. Peak levels occur after a period of time that may vary with food intake.
• Time to effect (ED): Many people notice effects within about 30 to 60 minutes. Some may experience earlier or later onset depending on dose, metabolism, and stomach contents.
• Distribution: Sildenafil distributes throughout the body; it can cross into tissues relevant to its effects.
• Metabolism: The medicine is metabolised mainly by CYP450 enzymes (notably CYP3A4).
• Elimination: Sildenafil and its metabolites are eliminated primarily through the liver and kidneys. The overall “duration” can vary based on liver function, age, and other medicines.

If you have liver or kidney impairment, exposure to sildenafil may increase. Dose adjustment or extra caution may be required.

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5) Typical use and timing

For erectile dysfunction (ED)

For most people, sildenafil is taken as needed. The best timing depends on how quickly you want it to work and how food affects absorption.

• Common timing: Take it about 30–60 minutes before planned sexual activity.
• Duration of effect: Effects may last for several hours in many people, but the peak response is often earlier.
• Sexual stimulation required: The medicine supports erection in response to stimulation; it is not an aphrodisiac.

For pulmonary arterial hypertension (PAH)

When used for PAH, dosing is typically taken at set times rather than immediately before activity. Your prescribing clinician will provide an individual schedule.

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6) Dosing guidance (general information)

Dosing can vary significantly between individuals and between indications (ED vs PAH). Below are general educational guidelines. Your product label and healthcare professional advice should always take priority.

ED dosing (general)

• Take only one dose per 24-hour period unless your healthcare professional specifically advises otherwise.
• Start low if you are advised to do so (many patients use lower doses than 120 mg depending on tolerability and risk factors).
• Seek medical review if you consistently cannot achieve an erection or if side effects are troublesome.

PAH dosing (general)

PAH regimens may differ from ED. If your intention is PAH treatment, follow the schedule provided for that condition.

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7) Food interactions (including high-fat meals)

Food can affect when sildenafil starts working. A heavy or high-fat meal may slow absorption and delay the time to peak effect.

• If you want quicker onset, consider taking sildenafil on a relatively lighter stomach.
• If you ate a large meal, you may need to allow more time before sexual activity.
• Alcohol and meals together can further affect performance and safety (see alcohol section below).

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8) Alcohol interactions

Moderate alcohol may reduce the ability to achieve or maintain an erection by affecting blood flow and nerve function. In addition, alcohol can contribute to dizziness and increase the risk of low blood pressure when combined with sildenafil.

Practical approach:

• Limit alcohol (especially if you are prone to low blood pressure).
• Avoid “heavy drinking” before taking sildenafil.
• If you feel light-headed, stop and sit down, and seek advice if symptoms persist.

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9) Medicine interactions (important)

Sildenafil has clinically important interactions. Some medicines can increase sildenafil levels (raising side effect risk), while others can decrease effectiveness. Some combinations may be unsafe.

Absolute or strongly avoidable combinations

• Nitrates used for chest pain (e.g., glyceryl trinitrate) — the combination can cause a significant drop in blood pressure.
• Riociguat (for pulmonary hypertension) — risk of low blood pressure.

Medicines that require extra caution

• Alpha-blockers for prostate symptoms or blood pressure (e.g., doxazosin, tamsulosin): can cause dizziness or low blood pressure, particularly when sildenafil is first started or dose is increased.
• Strong CYP3A4 inhibitors (some antibiotics/antifungals and HIV medicines): can raise sildenafil exposure and side effects. Examples may include certain macrolide antibiotics, azole antifungals, and protease inhibitors.
• Other blood pressure medicines: may increase the blood pressure-lowering effect.
• Other ED treatments (PDE5 inhibitors): generally not used together.

Always provide your pharmacist or healthcare provider with a complete list of your current medicines, including over-the-counter products, herbal supplements, and recreational drugs. This is particularly important if you use nitrates or medicines for pulmonary hypertension.

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10) Safety profile and possible side effects

Like all medicines, Cobra-120 may cause side effects. Not everyone gets them. Side effects are often related to blood vessel dilation and changes in blood flow.

Common side effects

• Headache
• Flushing (warmth, redness)
• Indigestion or nausea
• Stuffy or runny nose
• Dizziness
• Temporary visual changes (e.g., a bluish tint, increased light sensitivity)

Less common but more serious side effects

• Sudden vision loss or severe vision changes (rare): stop and seek urgent medical care.
• Sudden hearing loss (rare): stop and seek urgent medical care.
• Prolonged erection (priapism) lasting more than 4 hours: urgent medical attention is needed.
• Severe allergic reaction (swelling of face/lips, breathing difficulty): seek emergency help.
• Chest pain or fainting: urgent assessment is recommended.

Who should be extra cautious?

• Men with significant heart disease or unstable angina
• People with very low blood pressure
• Those with severe liver impairment
• Those with severe kidney impairment
• People taking medicines that interact with sildenafil

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11) Practical use tips for best results

• Take it at the right time: For ED, aim for about 30–60 minutes before planned intimacy. If you’ve eaten a heavy meal, consider allowing more time.
• Use sexual stimulation: Sildenafil supports erection in response to stimulation; it won’t replace arousal.
• Start with the lowest effective approach: Higher strengths may increase side effects. If you’re sensitive, discuss dose options with your healthcare professional.
• Hydrate and pace alcohol: Reduce alcohol to improve both safety and erection quality.
• Manage stress and lifestyle factors: Sleep, smoking status, and exercise can strongly influence ED outcomes.
• Don’t “double up”: If the first dose doesn’t work, do not take extra doses within the same 24 hours. Consider reviewing dosing timing, food effects, and interactions.

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12) When to seek medical advice promptly

Contact a healthcare professional as soon as possible if you experience:

• Chest pain during or after sex
• Fainting or severe dizziness
• Sudden vision or hearing changes
• An erection lasting longer than 4 hours
• Any side effects that feel severe or persistent
• ED that does not improve after several correctly timed attempts, especially if you have new or worsening symptoms

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13) Alternative options

Depending on the underlying cause of ED or PAH, other treatment options may be available. Alternatives may include:

ED alternatives

• Other PDE5 inhibitors: e.g., tadalafil or vardenafil (different onset and duration characteristics).
• Lifestyle and risk factor management: exercise, weight management, smoking cessation, reducing alcohol.
• Psychosexual support: stress, anxiety, and relationship factors can contribute.
• Vacuum erection devices or other medical devices.
• Injection therapies or intraurethral treatments (specialist-guided).
• For some causes: treatment of hormone problems or medication-related ED (where relevant).

PAH alternatives

• Other PAH-targeted therapies (e.g., endothelin receptor antagonists or prostacyclin pathway agents), selected by specialist teams.
• Supportive care and risk stratification strategies.

If you are considering alternatives, discuss with a healthcare professional to ensure safety and suitability for your condition and other medicines.

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14) Market and legal context in Australia (what to expect)

Medicines containing sildenafil are regulated in Australia. Supply and eligibility can vary depending on whether the product is intended for ED or other conditions, and on the specific formulation and packaging.

In Australia, reputable online pharmacies will typically:

• Follow relevant regulatory requirements for the sale and distribution of medicines.
• Use appropriate checks to support safe supply.
• Provide product information and guidance on safe use.
• Ensure secure packaging and delivery practices.

If you have questions about availability, suitability, or delivery to your area, contact the pharmacy support team before ordering.

Recent guidance (general)

Guidance for PDE5 inhibitors typically emphasises safety around interactions (especially nitrates and certain pulmonary hypertension medicines), cardiovascular fitness, and careful consideration of alpha-blockers and blood pressure lowering effects. Always follow the most current information provided with your specific product and on the relevant official health websites.

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15) Delivery and availability

Availability can vary by supplier, stock levels, and the specific strength you order. When ordering online, check that the product description matches the strength you need and review delivery time estimates carefully.

• Dispatch: Many pharmacies dispatch orders within business days once payment and required checks are completed.
• Packaging: Medicines should arrive in secure, discreet packaging to protect the tablet blister and label integrity.
• Tracking: Some orders may include tracking or delivery confirmation.
• Storage on arrival: Store according to label directions (commonly at room temperature, away from moisture and heat).

If you need the product urgently or have concerns about delivery, contact customer service before placing your order.

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16) Storage and handling

• Store tablets in the original packaging.
• Keep away from children.
• Avoid storing in bathrooms or places with high humidity.
• Do not use after the expiry date printed on the pack.

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17) Frequently Asked Questions (FAQ)

How quickly does Cobra-120 work?

For many people with ED, effects begin within 30–60 minutes. A heavy or high-fat meal can delay onset, so you may need to allow more time if you have eaten recently.

How long does it last?

Many people experience effects for several hours. Actual duration varies due to dose, metabolism, age, and other medicines.

Can I take Cobra-120 every day?

For ED, sildenafil is typically used as needed, not on a daily basis. Use more frequently than directed increases risk of side effects. Follow the dosing instructions on your product and the advice you received.

Can I take it with food?

Yes, but high-fat meals may slow absorption and delay effectiveness. For best timing, consider taking it with a lighter meal or on a relatively empty stomach.

Is it safe with alcohol?

Limit alcohol. Alcohol can worsen erectile performance and increase dizziness or the chance of low blood pressure. Avoid heavy drinking, and stop if you feel unwell.

What medicines should not be taken with sildenafil?

Avoid combining sildenafil with nitrates and riociguat. Extra caution is also needed with alpha-blockers and medicines that affect CYP3A4 (some antibiotics, antifungals, and HIV medicines). Always check your full medication list with a pharmacist or healthcare professional.

What if it doesn’t work the first time?

Review timing and factors such as food intake, alcohol use, and sexual stimulation. Also consider interactions with other medicines and underlying causes of ED (stress, diabetes, cardiovascular risk). Do not take extra doses within the same 24 hours—seek advice if it repeatedly fails.

Can women take sildenafil?

Sildenafil is sometimes used for PAH in both men and women under specialist guidance. ED use is intended for men. Use in women depends on indication and should be guided by appropriate medical advice.

Are there any signs of emergency?

Yes. Seek urgent care if you experience chest pain, fainting, sudden vision loss, sudden hearing loss, or an erection lasting more than 4 hours.

Will sildenafil cure erectile dysfunction?

Sildenafil helps symptoms (achieving an erection) but does not remove all underlying causes. Addressing lifestyle factors, cardiovascular health, psychological factors, and medication contributors can improve long-term outcomes.

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Summary

Cobra-120 (sildenafil citrate) is a PDE5 inhibitor used to help men with ED achieve and maintain an erection in response to sexual stimulation. It works by supporting blood flow through a nitric oxide–cGMP pathway.

• Timing: often 30–60 minutes before intimacy (may be delayed after heavy meals).
• Interactions: avoid nitrates and riociguat; use extra caution with alpha-blockers and certain CYP3A4-affecting medicines.
• Safety: watch for rare but serious effects (vision/hearing changes, priapism, severe dizziness/chest pain).
• Practical tips: limit alcohol, avoid heavy meals close to dosing, and follow label directions.

If you have questions about suitability, dosing, or interactions—especially if you take heart medicines or medicines for pulmonary hypertension— speak with a healthcare professional or pharmacist before using Cobra-120.