Sildenafil 100 Mg Australia

Last Updated on 06/26/2026 ✔ Medically Reviewed by Dr. Arjun Srivastav

What Is Sildenafil 100 Mg?

Sildenafil 100 mg is a prescription medication used primarily to treat erectile dysfunction (ED) in adult men. It contains Sildenafil Citrate as its active ingredient and belongs to the Phosphodiesterase Type-5 (PDE5) inhibitor class of medicines.

Sildenafil 100 mg relaxes the smooth muscles and blood vessels in the penis, allowing increased blood flow during sexual arousal. This improved circulation helps produce a stronger and more sustainable erection, supporting satisfactory sexual performance.

➦ Sildenfil Forms Available

1. Tablet (most common)

2. Oral Jelly

3. Chewable Tablets

4. Softgel Capsules

How Does Sildenafil 100mg Work?

Here is how Sildenafil activates, which can get you a hard erection.

• Normally, the PDE5 enzyme breaks down cGMP too quickly. Sildenafil inhibits PDE5, allowing cGMP levels to remain elevated.
• Higher cGMP levels relax the smooth muscles in the penile blood vessels and erectile tissue.
• Relaxed blood vessels allow more blood to flow into the erectile tissue of the penis while reducing blood outflow. The increased blood flow fills the erectile tissue, resulting in a firm erection suitable for sexual activity.

How To Take Sildenafil 100 Mg

• Correct Timing: The right time to take the pill for an erection is 60 minutes before sex. You must have the sexual desire in you for the medicine to work on you and give you the desired erection.
• Correct Food Habit: The tablet’s absorption is delayed by a thick margin when you take it with heavy or fatty meals. Always try to take it with empty stomach. If you feel nausea (some patients do feel it), then take it with light meals.
• Correct way of taking: Swallow the pill with water and never break or chew the drug. This is not a chewable pill.
• Safety Measures: The drug remains in your blood for 24 hours. Therefore, never take another dose within the 24-hour period, as that will cause an overdose.

Uses Of Sildenafil 100 Mg

• Difficulty achieving or maintaining an erection
• Sometimes used for pulmonary hypertension (different dosing)
• Sildenafil 100 mg Viagra® is only used in the condition of male ED.
• It helps temporarily to get rid of the ED signs and get strong and durable erections longer.
• Each Sildenafil 100 mg dose is active for close to 6 hours, during which you will be able to get its effects.

Benefits Of Sildenafil 100 Mg

• Give Erection to ED patients: The drug is a PDE5 inhibitor, and it gives a strong erection to those males who cannot get an erection even though they have sexual desires.
• Helps in Hypertension: The drug also assists patients with hypertension with its vasodilation effect.
• Keeps you erect for hours: Sildenafil will keep you erect for 4 hours, with the nitric oxide release, emphasized by the inhibition of PDE5. Thus, you and your partner are going to enjoy the pleasure for long hours.
• Confidence regained: You will regain the confidence in bed, which you were missing since the time you started suffering from ED.
• Stress Reliever: The drug acts as a stress reliver, as it reduces anxiety due to not getting an erection at the time of sex.

Recommended Dosage Of Sildenafil

General Dosage: The recommended dose for Sildenafil is only one pill within 24 hours, taken 60 minutes before sex with a light meal or on an empty stomach. If you are starting the dose of Sildenafil, then you can start with a 50 mg tablet.

Dosage Adjustment: There are some agents (CYP3A4 inhibitors) that increase sildenafil content in your blood. If you take such medicines, take Sildenafil 50 mg. On the other hand, there are some medicines like CYP3A4 inducers, which decrease the concentration of Sildenafil in the blood. In such cases, you will need to take a higher dose.

Doctors always recommend that a patient follow their guidance in selecting the right strength of medicine to get the best results.

Alternative Dosage:

• Sildenafil 25
• Sildenafil 50
• Sildenafil Citrate Sublingual Tablets 100mg

• Tadalafil: While Sildenafil starts its action within 60 minutes of intake, tadalafil starts its action within 30 minutes. Moreover, Tadalafil interacts less with food. So, it can be consumed with food. It gives a 36-hour window to an ED patient compared to the 24-hour window provided by Sildenafil.
• Vardenafil: It is somewhat similar to Sildenafil by all means, such as action of time, window provided and food interaction.
• Avanafil: The window provided is 24-hour here too. Food interaction is lower and the action of time is lowest among all the PDE-5 inhibitors. It is only 15-20 minutes from the time of intake.

Fact Box

Sildenafil 100 Mg vs Other ED Medicines

There are three other PDE5 inhibitors other than Sildenafil:

• Tadalafil: While Sildenafil starts its action within 60 minutes of intake, tadalafil starts its action within 30 minutes. Moreover, Tadalafil interacts less with food. So, it can be consumed with food. It gives a 36-hour window to an ED patient compared to the 24-hour window provided by Sildenafil.
• Vardenafil: It is some what similar to Sildenafil by all means, such as action of time, window provided, and food interaction.
• Avanafil: The window provided is 24-hour here too. Food interaction is lower and the action of time is lowest among all the PDE5 inhibitors. It is only 15-20 minutes from the time of intake.

Drug Interactions Of Sildenafil 100 Mg

➯ Major interactions – Totally Contraindicated:

• Nitrates: Usually taken for the treatment of angina, isosorbides and poppers can be dangerous with sildenafil. It can cause severe hypotension and, at the same time, can cause a life-threatening heart attack.
• Preexisting heart condition: If you are already having a severe heart disorder, a history of bypass or angioplasty, avoid taking Sildenafil, as it can cause acute chest pain and therefore cause a heart attack.

➯ Regular Interactions – Must be careful:

• CYP3A4 Inhibitors: Antibiotics like clarithromycin, HIV Protease inhibitors like ritonavir, and Antifungals like itraconazole increase sildenafil concentration in blood, causing rise of side effects. Need to reduce the dose if you take such medicines.
• Blood Pressure Handlers: Drugs like blood thinners (warfarin) and antihypertensives can cause hypotension in the patient. Need dosage adjustment (specifically the dosage timing).
• Preexisting Ailments: Preexisting liver or renal conditions must be discussed with a doctor before taking sildenafil. The doctor will do some tests to suggest the intake and might make a dosage adjustment.
• Alcohol intake: Alcohol is strictly prohibited with all the PDE5 inhibitors, as it causes severe dizziness and can increase toxicity in the liver.

What Are The Side Effects Of Sildenafil 100 mg?

The chances of side effects of sildenafil increase only when you overdose or if Sildenafil interacts with other medicines. We shall find out what may happen in case there are any mild or severe issues.

➦ Mild side effects

• Headache
• Dizziness
• Nausea
• Vomiting
• Diarrhoea
• Stomach cramps
• Palpitations
• Flushing

➦ More severe issues

• Chest pain
• Priapism
• Abrupt rise and fall in blood pressure

With these side effects, the doctors will tell you to stop using the medicine.

Precautions & Warnings

• As per the findings of the FDA, a strong interaction of Sildenafil has been found with all forms of addictive substances.
• Thus, it is better to avoid taking alcohol or narcotic drugs
• Avoid taking the medicine if you already have high BP, or else your BP levels can go dangerously high.
• It is not safe to use the medicine with a very severe issue with the liver and kidneys.

Where To Buy Sildenafil 100 mg Online Australia?

You can rely on trusted platforms such as australiarxmeds.com for secure and discreet delivery across Australia, including Sydney, Melbourne, Brisbane, Perth, and regional areas..

Sildenafil 100 is available for online purchase through pharmacy websites, but it’s important to choose reputable and licensed sellers to guarantee product quality, authenticity, and safety.