Cobra-120 (Sildenafil Citrate) — Patient Information

Cobra-120 is a medicine containing sildenafil citrate, used to treat erectile dysfunction (ED) and, in some situations, pulmonary arterial hypertension (PAH). This guide explains how it works, how to use it safely, what to expect, and what to consider with other medicines, food, and alcohol.

Important: Always read the consumer medicine information (CMI) provided with your product and follow the instructions given by your healthcare professional. If you have questions about whether Cobra-120 is suitable for you, speak with a doctor or pharmacist.

1) Basic product information

• Brand name: Cobra-120
• Active ingredient: Sildenafil citrate
• Strength: 120 mg (as marketed for Cobra-120)
• Medicines class: Phosphodiesterase type 5 (PDE5) inhibitor
• Common uses: Erectile dysfunction; pulmonary arterial hypertension (depending on individual circumstances and approved indications)
• Availability (Australia): Sildenafil-containing products are widely used in Australia; availability may vary by brand and strength.

2) What sildenafil does (mechanism of action)

Sildenafil belongs to a group of medicines called PDE5 inhibitors. To achieve an erection, blood flow to the penis must increase and blood must be held in the erectile tissue. Sildenafil works by:

• Blocking the PDE5 enzyme, which normally breaks down a chemical messenger called cGMP.
• By blocking PDE5, sildenafil helps maintain cGMP levels.
• This leads to relaxation of smooth muscle and increased blood flow to the penis during sexual stimulation.

For PAH, sildenafil helps reduce resistance in the lung blood vessels, which can improve exercise capacity and symptoms in selected patients.

3) Pharmacokinetics (how the body handles it)

Pharmacokinetics describes how the body absorbs, distributes, metabolises, and removes a medicine. Key points for sildenafil (general ranges) include:

If you have liver impairment, your body may clear sildenafil more slowly, increasing the chance of side effects. Dose adjustments may be required.

4) Typical use & timing

A) Erectile dysfunction (ED)

Cobra-120 is used to help treat erectile dysfunction in adult men. It supports erection quality in response to sexual stimulation. It does not increase sexual desire by itself.

When should you take it?

• Take the tablet about 30 minutes to 1 hour before sexual activity.
• Some people may notice effects sooner or later—this can vary based on factors such as food intake and individual metabolism.
• In general, you should not take more often than advised on the product information or by a healthcare professional.

B) Pulmonary arterial hypertension (PAH)

In selected patients, sildenafil may be used for PAH to improve exercise capacity and symptoms. Dosing and timing for PAH may differ from ED use. Use exactly as directed for your condition.

5) Indications (what it’s used for)

Sildenafil-containing medicines are used for:

• Erectile dysfunction (ED): The inability to achieve or maintain an erection sufficient for satisfactory sexual performance.
• Pulmonary arterial hypertension (PAH): A specific type of high blood pressure in the lungs (details depend on the exact approved indication and regimen).

If you’re unsure which condition you’re treating, check your product information or ask a pharmacist.

6) Dosing guidance (including common adult instructions)

Dosing depends on your condition, other medicines, and personal factors such as age and liver/kidney function. The strength Cobra-120 is relatively high; you should follow local dosing directions and your healthcare professional’s guidance.

Common ED dosing principles (general information)

• Use the lowest effective dose that works for you.
• Sildenafil is typically taken as needed for ED, before sexual activity.
• Maximum frequency: Do not exceed dosing limits stated in the product information. Many sildenafil regimens advise waiting at least 24 hours between doses for ED.

PAH dosing principles (general information)

• For PAH, sildenafil is often taken on a regular schedule (not “as needed”).
• The correct strength and schedule differ by patient—follow your prescribed or pharmacist-provided instructions.

Swallowing tips

• Swallow the tablet with water.
• Try to take it at the same time intervals each dose day if using for PAH.
• If you miss a dose for PAH, follow the missed-dose advice provided with your product or by your healthcare professional. For ED, take it only when you need it and within dosing limits.

7) Food interactions (including high-fat meals)

Food can affect how quickly sildenafil starts working. A high-fat meal may delay absorption and reduce the speed of onset. This can mean the tablet takes longer to work or feels “less effective” if you time it too early.

Practical timing with meals

• If possible, consider taking it when you’re not eating a heavy meal.
• For best results, some people prefer taking it after a lighter meal.
• If you plan a large, high-fat dinner, you may need to adjust timing (often closer to 1 hour before activity, or as advised for your situation).

8) Alcohol and medicine interactions

Alcohol

Alcohol may worsen ED by affecting arousal and erection quality and may increase dizziness or lower blood pressure. Moderate amounts may still be tolerated by some individuals, but heavy drinking can reduce effectiveness and increase side effects.

• Start with small amounts to see how you respond.
• Avoid excessive alcohol when using sildenafil, especially if you feel light-headed.

Major medicine interactions (very important)

Sildenafil is processed in the liver (CYP3A4). Medicines that strongly affect CYP3A4 can change sildenafil levels. Also, combining sildenafil with certain nitrate medicines can cause a dangerous drop in blood pressure.

Do NOT use sildenafil with nitrates (or nitric oxide donors), such as:

• Glyceryl trinitrate (GTN)
• Isosorbide dinitrate / isosorbide mononitrate
• Some “poppers” containing nitrites

This combination can lead to severe hypotension (dangerously low blood pressure). If you use nitrates for chest pain (angina), seek urgent medical advice about safe erectile and cardiovascular treatment options.

Other interactions to discuss with a pharmacist or doctor

• Riociguat (for PAH): can significantly increase risk of low blood pressure.
• Alpha-blockers (for prostate symptoms or blood pressure), such as tamsulosin: may increase risk of dizziness or low blood pressure, especially when starting sildenafil or using higher doses.
• Strong CYP3A4 inhibitors (can increase sildenafil levels): examples include some antifungals and certain antibiotics (the exact list should be checked against your medicines).
• Other PDE5 inhibitors: avoid combination due to additive effects and side effects.
• Antihypertensives: may increase chance of low blood pressure when combined.

Always provide your pharmacist with a complete list of: prescription medicines, over-the-counter products, and herbal supplements (e.g., “natural” male enhancement products), including doses.

9) Safety profile & potential side effects

Most people tolerate sildenafil well, but side effects can occur. The likelihood of side effects can increase with higher doses, alcohol, dehydration, and certain interacting medicines.

Common side effects

• Headache
• Flushing (warmth/redness)
• Dizziness
• Indigestion or nausea
• Blocked nose (nasal congestion)
• Visual disturbances (e.g., slight blurring or changes in colour perception)

Less common but serious side effects — seek urgent help

• Chest pain or symptoms of heart problems
• Severe dizziness or fainting
• Sudden loss of vision in one or both eyes (rare)
• Sudden hearing loss (rare)
• Priapism (an erection lasting longer than 4 hours): this is a medical emergency.

Who should be extra cautious?

Discuss sildenafil before use if you have:

• Low blood pressure or a history of fainting
• Recent stroke or heart attack
• Severe heart disease, unstable angina, or significant cardiovascular limitations
• Liver or kidney impairment
• Conditions affecting erections (e.g., Peyronie’s disease, sickle cell disease)

If you experience side effects, stop and seek medical advice promptly for guidance.

10) Practical use tips for best results

• Allow enough time: For ED, take it 30–60 minutes before sex (often 1 hour is a good starting point).
• Keep expectations realistic: Sildenafil assists erection quality with sexual stimulation; it does not create arousal.
• Reduce confounders: High-fat meals and heavy alcohol can delay or reduce effectiveness.
• Start low and adjust safely: Since Cobra-120 is a higher strength, ensure it matches your dosing plan. Don’t increase dose frequency without medical advice.
• Be mindful of hydration: Dehydration can worsen dizziness and headaches.
• Avoid “mix-and-match” enhancement products: Do not combine with other PDE5 inhibitors or products containing nitrates/nitrites.
• Plan around driving: If you feel dizzy, avoid driving or operating machinery.

11) Alternative options for erectile dysfunction (ED)

If Cobra-120 isn’t suitable or doesn’t work well, several alternatives exist in Australia. Options depend on your health and preferences.

Other prescription ED treatments

• Other PDE5 inhibitors: different sildenafil brands, or tadalafil/vardenafil/others (availability varies).
• Vacuum erection devices: non-medicinal approach that can help achieve erections.
• Intraurethral or injectable therapies: used in select cases under clinical guidance.
• Psychological and lifestyle approaches: stress, anxiety, smoking cessation, weight management, exercise, and addressing sleep problems can improve ED.

Non-medicine and lifestyle measures

• Reduce smoking and excessive alcohol
• Improve sleep and manage stress
• Address cardiovascular risk factors (blood pressure, diabetes, cholesterol)
• Consider pelvic floor exercises where appropriate

If ED is new or worsening, it can sometimes signal underlying vascular or metabolic issues—consult a clinician for a thorough assessment.

12) Market and legal context in Australia (overview)

In Australia, medicines containing sildenafil may be available through regulated channels depending on strength and indication. When purchasing online, reputable suppliers should provide:

• Clear product information and correct labelling
• Information about expiry dates and batch numbers
• Compliance with Australian regulatory requirements for supply of medicines
• Transparent delivery terms and customer support

Always choose suppliers that comply with Australian laws and use appropriate supply processes. Be cautious of unlabelled products, inconsistent dosing, or “discount” sources that cannot verify identity and quality.

13) Recent guidance and important safety reminders

Medical guidance continues to emphasise:

• Avoiding nitrate combinations due to risk of severe hypotension.
• Assessing cardiovascular safety before sexual activity, especially in people with heart disease.
• Reviewing interactions with CYP3A4 inhibitors and alpha-blockers.
• Stopping and seeking urgent care if serious vision/hearing changes occur or if an erection lasts too long.

If you have had new symptoms (such as chest pain, fainting, or worsening shortness of breath), seek medical advice before using sildenafil again.

14) Delivery and availability (online pharmacy)

Availability of Cobra-120 can vary by stock levels and pharmacy supply chains. When ordering online in Australia, typical factors include:

• Dispatch times: commonly within 1–2 business days where stock is available.
• Delivery network: parcels are often sent via standard or express courier services.
• Delivery areas: coverage may differ for remote locations.
• Packaging: discreet packaging is commonly used to protect privacy.

Check the website for current delivery estimates, shipping fees, and returns/refunds policies. Ensure someone can receive the parcel if required.

15) FAQ — Frequently asked questions

How long does Cobra-120 take to work?

For ED, many people notice effects within 30–60 minutes. Peak effect often occurs around 1–2 hours. A heavy, high-fat meal can delay onset.

How long will it last?

Sildenafil’s effects can last several hours. Individual response varies. If you’re planning sexual activity, allow adequate time and use within your dosing instructions.

Can I take it every day?

ED dosing is usually as needed rather than daily. Do not exceed the maximum frequency described in the product information. For PAH, dosing may be different and often scheduled—follow the relevant instructions for your condition.

What if it doesn’t work?

Sildenafil helps erections in response to sexual stimulation, but it may not work if the dose is too low, sexual stimulation is insufficient, or significant interactions reduce effectiveness. Consider:

• Whether you took it with a heavy meal or with alcohol
• Whether interacting medicines are present
• Your overall cardiovascular health and stress/anxiety factors

Speak with a pharmacist or doctor for a safe dose/option adjustment.

Is it safe with blood pressure medicines?

Some people can take sildenafil safely with antihypertensives, but the combination may increase dizziness or lower blood pressure. Caution is especially important with alpha-blockers and other medications that affect blood pressure. Discuss your medication list with a healthcare professional.

Can I use Cobra-120 with nitrates for angina?

No. Combining sildenafil with nitrates (including nitroglycerin/GTN and isosorbide medicines) can cause a dangerous drop in blood pressure. If you use nitrates, seek urgent medical advice about safe alternatives.

What are the warning signs that mean I should seek urgent medical help?

• Chest pain, fainting, or severe dizziness
• An erection lasting longer than 4 hours
• Sudden vision loss or severe changes in vision
• Sudden hearing loss

Are there any dietary restrictions?

No specific “diet” is required, but avoid or reduce heavy, high-fat meals close to dosing if you want more predictable onset.

Does it affect fertility or testosterone?

Sildenafil is not a fertility hormone and does not replace testosterone. It works on blood flow pathways related to erections.

Can women take sildenafil?

Sildenafil is generally used in specific male indications and selected PAH regimens under medical supervision. If a person is prescribed sildenafil, use should follow the appropriate product instructions.

How should I store Cobra-120 tablets?

Store tablets as directed on the pack (typically at room temperature, away from moisture and heat). Keep medicines out of reach of children.

Final notes

Cobra-120 (sildenafil citrate) can be an effective treatment for erectile dysfunction and, for some people, pulmonary arterial hypertension. For the safest and most reliable experience, take it according to the correct dosing schedule, avoid dangerous interactions (especially nitrates), be mindful of food and alcohol effects, and seek medical help for urgent warning signs.