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

Cobra-120 is a brand of sildenafil citrate, a medicine used to treat erectile dysfunction (ED) in men and (in certain lower-dose products) pulmonary arterial hypertension (PAH). This page explains how Cobra-120 works, how to take it safely, typical timing, interactions (including with alcohol and other medicines), and what to expect.

Always follow the instructions given by your healthcare professional and read the consumer medicine information provided with your medicine. If you are unsure whether Cobra-120 is right for you, seek advice before use.

1) Basic product information

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

Sildenafil is a PDE5 inhibitor (phosphodiesterase type 5 inhibitor). During sexual arousal, the body releases nitric oxide, which increases levels of cyclic GMP in blood vessels. This leads to relaxation of smooth muscle and increased blood flow to the penis, supporting erection.

In the presence of sexual stimulation, sildenafil helps by blocking PDE5—an enzyme that would normally break down cyclic GMP. As a result, blood flow is improved and erections are easier to achieve and maintain.

• Important: Cobra-120 does not automatically cause an erection without sexual stimulation.
• It works by enhancing the natural erectile response to arousal.

3) Pharmacokinetics (how the body handles the medicine)

Pharmacokinetics describe absorption, distribution, metabolism, and elimination. For sildenafil, the key points are:

• Absorption: Sildenafil is absorbed after oral dosing. Peak blood levels are commonly reached within about 30–120 minutes, although this can vary.
• Effect of food: A high-fat meal can slow absorption and delay onset.
• Distribution: Sildenafil is distributed through the bloodstream and tissues.
• Metabolism: It is mainly metabolised by the liver enzyme CYP3A4.
• Elimination: Metabolites are excreted primarily via the faeces and urine.
• Half-life: A typical terminal half-life is around a few hours (commonly cited around 3–5 hours), contributing to several hours of potential effect.

Because metabolism involves the liver, people with liver impairment may have higher or longer-lasting levels and may require adjustment under medical guidance.

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

Cobra-120 (sildenafil citrate) is used to treat erectile dysfunction in adult men. ED is the inability to achieve or maintain an erection sufficient for satisfactory sexual performance.

Sildenafil may also be used in specific formulations and dose ranges for certain types of pulmonary arterial hypertension. However, if you are considering sildenafil for a condition other than ED, ensure you have the correct product and dosing for that indication.

5) Typical dosing and how to take it

Dosing should be individualised based on response and tolerability. In many ED treatment regimens, sildenafil is started at a lower dose and adjusted if needed. Because Cobra-120 is a higher strength tablet (120 mg), it is particularly important to follow the dosing directions provided for your product and situation.

Typical schedule for ED

• Take by mouth, as needed before sexual activity.
• Timing: Commonly 30–60 minutes before sex, but this may vary.
• Frequency: Do not take more often than recommended for your product instructions.
• Maximum dose: Follow the maximum dose guidance provided by your clinician or the product information. (Do not exceed recommended limits.)

How to use effectively

• Take the tablet with water.
• Sexual stimulation is still required for the medicine to help you get an erection.
• If it doesn’t work as expected, consider timing, food intake, alcohol, and other medications that may interfere.

Missed dose

Cobra-120 is typically taken as needed, so there is usually no “missed dose.” If you meant to take it before an occasion and time has passed, take it only if you are still within the recommended window for your dosing instructions.

6) When it starts working and timing tips

Many people notice effects within about 30 to 60 minutes after taking sildenafil. Peak effect can occur around that timeframe, and the medicine may remain effective for up to around 4 hours (individual results vary).

• For best results: choose a time when you expect sexual activity and allow enough time for onset.
• If you ate a heavy/high-fat meal: onset may be delayed. You may need to plan timing more carefully.
• Stress, anxiety, smoking, and alcohol: these can also affect erection quality, even when the medicine is working.

7) Food interactions (including high-fat meals)

Food can affect how quickly sildenafil is absorbed. A high-fat meal may reduce and delay the blood level peak, which can make the medicine feel like it “starts later” or is less effective.

• Light meals: often cause less delay.
• Heavy or greasy meals: may delay onset—consider taking Cobra-120 with more time before planned sex.
• Hydration: drinking water may help you feel more comfortable; however, avoid excessive fluid close to bedtime if that affects you.

8) Alcohol and medicine interactions

Alcohol

Alcohol can contribute to erectile difficulties by affecting blood flow, nerve function, and testosterone balance. Drinking alcohol may also increase side effects such as headache, dizziness, flushing, and low blood pressure.

• For safety and better erections: keep alcohol moderate.
• Avoid excessive alcohol: heavy drinking may significantly reduce effectiveness.
• Be careful with dizziness: if you feel light-headed, sit down and do not drive.

Medicines that can interact with sildenafil (important)

Sildenafil can interact with other medicines that affect blood pressure, liver enzymes, or nitric oxide pathways. Some combinations can be dangerous.

Absolute or high-risk interactions

• Nitrates (used for chest pain/angina), such as glyceryl trinitrate (GTN) and isosorbide products: Do not combine because this can cause a significant fall in blood pressure.
• Riociguat (for pulmonary hypertension): Do not combine due to risk of marked hypotension.

Medicines that may increase sildenafil levels

Sildenafil is metabolised by CYP3A4. Medicines that inhibit this enzyme can raise sildenafil levels and increase the chance of side effects (such as flushing, headache, dizziness, and vision changes).

• Some antifungals (e.g., ketoconazole, itraconazole)
• Some antibiotics (e.g., clarithromycin)
• Some HIV medicines (certain protease inhibitors)
• Some other medications that inhibit CYP3A4

Medicines that may lower sildenafil levels

Drugs that induce CYP3A4 may reduce sildenafil levels and effectiveness.

• Some seizure medicines (e.g., carbamazepine, phenytoin)
• Some rifamycin antibiotics
• St John’s wort (a herbal product)

Blood pressure medicines and alpha-blockers

Sildenafil may add to the blood-pressure-lowering effects of other medicines. Special caution is needed with:

• Alpha-blockers (for prostate symptoms or high blood pressure), such as tamsulosin, doxazosin, or similar agents.
• Other antihypertensives or vasodilators.

If you take alpha-blockers, ask your healthcare professional about the safest timing and dose adjustments.

Other important interaction considerations

• Grapefruit products: can inhibit metabolism and potentially increase sildenafil levels. Consider avoiding grapefruit juice and large grapefruit intake.
• Recreational drugs (“poppers”): products containing nitrates can be especially dangerous with PDE5 inhibitors. Avoid completely.
• Smoking: not a direct drug interaction, but it can worsen erectile function and reduce the chance of satisfactory results.

9) Safety profile: side effects and warning signs

Like all medicines, Cobra-120 can cause side effects. Many are mild and temporary, but some symptoms require urgent medical attention.

Common side effects

• Headache
• Flushing (warmth or redness of the face)
• Dizziness
• Stuffy or runny nose
• Indigestion or nausea
• Visual disturbances (e.g., blurred vision or changes in colour perception)
• Back pain or muscle aches (less common, but can occur)

Seek urgent help if you experience

• Chest pain or symptoms of heart problems that do not settle.
• Severe dizziness, fainting, or symptoms of dangerously low blood pressure.
• Sudden vision loss or a significant change in vision.
• Sudden hearing loss (rare but serious).
• An erection that lasts longer than recommended (a prolonged erection/possible priapism).

Who should be extra cautious

Talk to a healthcare professional before using sildenafil if you have any of the following:

• Heart disease or unstable angina
• Low blood pressure (hypotension)
• Severe liver disease
• Severe kidney impairment
• History of non-arteritic anterior ischaemic optic neuropathy (NAION)
• Conditions that can increase risk of prolonged erections (e.g., certain blood disorders)

10) Practical use tips (for better outcomes)

• Plan ahead: take Cobra-120 with enough time for onset. Many people aim for 30–60 minutes before sex.
• Keep meals lighter: if you’re taking it for ED, avoid a heavy high-fat meal beforehand where possible.
• Use sexual stimulation: sildenafil supports erections during arousal; it is not an automatic trigger.
• Manage anxiety: performance anxiety can interfere with erection even when the medicine is working.
• Avoid risky combinations: never use nitrates or riociguat with sildenafil.
• Start with safe expectations: results vary. If you need a different dose, discuss options with a clinician.
• Consider lifestyle factors: regular exercise, sleep, smoking cessation, and moderating alcohol can improve ED long-term.

11) Alternative options for erectile dysfunction

If Cobra-120 is not suitable or doesn’t work for you, there are several alternatives. Options may include other PDE5 inhibitors, different dosing strategies, or non-medication approaches.

Other medicines (same class)

• Tadalafil (a different PDE5 inhibitor; often longer lasting)
• Vardenafil
• Avanafil

Other approaches

• Address underlying causes: diabetes, hypertension, cardiovascular risk, hormonal factors, depression, and medication side effects.
• Psychosexual support: counselling can help when anxiety or relationship factors contribute.
• Mechanical aids: vacuum erection devices can be useful for some men.
• Other prescription options: depending on local guidance and suitability, options beyond PDE5 inhibitors may be considered.

If you are considering alternatives, discuss benefits, side effects, and interaction risks—especially if you take heart or blood-pressure medicines.

12) Market and legal context for Australia (overview)

Medicines in Australia are regulated by the Australian Therapeutic Goods Administration (TGA). Access depends on product classification and supply arrangements (for example, pharmacist-only availability for certain products, and prescription-only status for others).

An online pharmacy should operate in line with Australian requirements, including:

• Using legitimate supply channels
• Providing accurate product information and dosage instructions
• Including safety warnings and advice about contraindicated combinations
• Respecting privacy and responsible use

Because rules can vary by product type and strength, always confirm the product details and intended indication shown on the package and in the medicine information.

13) Recent guidance and ongoing safety considerations

Regulatory and clinical guidance for sildenafil/PDE5 inhibitors focuses on:

• Recognising contraindications (especially nitrates and riociguat)
• Assessing cardiovascular risk before sexual activity in men with serious heart conditions
• Awareness of rare but serious events (vision/hearing changes, prolonged erections)
• Careful use with interacting medicines (CYP3A4 inhibitors, alpha-blockers, antihypertensives)

If your health status changes—new medications, heart symptoms, or worsening kidney/liver problems—revisit whether sildenafil is still appropriate.

14) Delivery and availability (Australia)

Cobra-120 is commonly supplied through registered channels. Delivery times vary by provider and location across Australia. When ordering online, you should typically receive:

• Tracking information (where available)
• Product packaging and consumer medicine information as required
• Clear delivery estimates before dispatch

If you have questions about availability, delivery schedules, or stock updates, contact the pharmacy directly using the details on the website.

15) Storage and handling

• Store at or below room temperature unless the product label states otherwise.
• Keep tablets in their original packaging.
• Keep out of sight and reach of children.
• Do not use after the expiry date on the package.

FAQ — Cobra-120 (Sildenafil Citrate)

1) How soon does Cobra-120 work?

Many people feel effects within 30–60 minutes. A heavy high-fat meal may delay onset. For best results, plan timing and allow enough time before sexual activity.

2) How long does it last?

Effects often last for up to around 4 hours, but individual responses vary. The medicine may still be active even if the erection is not immediate—arousal and timing both matter.

3) Can I take Cobra-120 every day?

Cobra-120 is typically used as needed for ED. Do not take it more frequently than recommended for your product and health circumstances. Discuss safe dosing with a healthcare professional if you need regular use.

4) Does it work without sexual stimulation?

No. Sildenafil helps support erections during sexual arousal. It does not automatically cause an erection.

5) Can I drink alcohol with Cobra-120?

Light-to-moderate alcohol may be tolerated by some people, but alcohol can reduce erection quality and increase side effects like dizziness and flushing. Avoid heavy drinking for best results and safety.

6) What medicines should I avoid?

Do not combine sildenafil with nitrates (for angina) or riociguat. Also use caution with medicines that interact through liver enzymes or affect blood pressure—such as some antibiotics/antifungals, HIV medicines, and alpha-blockers.

7) What if it doesn’t work for me?

Consider timing (often 30–60 minutes before sex), meal type (avoid heavy high-fat meals), alcohol intake, and other medications. If you’ve tried as directed and it still doesn’t work, speak with a healthcare professional about dose adjustments or alternative options.

8) Are there any serious side effects?

Serious but uncommon events can occur, including sudden vision or hearing changes, severe dizziness/fainting, chest pain, or a prolonged erection. Seek urgent medical help if these occur.

9) Can women or children use sildenafil?

Sildenafil for ED is intended for adult men. Use in women or children should only occur if specifically advised for an appropriate condition and with the correct product and dose.

10) How should I store Cobra-120?

Keep in the original packaging, store at or below room temperature unless the label states otherwise, and protect from moisture. Keep out of sight and reach of children.

Important final note

Erectile dysfunction can be linked to underlying health conditions such as cardiovascular disease, diabetes, or medication side effects. If your ED is new, worsening, or accompanied by chest pain, breathlessness, or fainting, seek medical advice promptly.

Always read the consumer medicine information for your specific product and follow professional guidance on suitability and safe use.