Viagra, manufactured by Pfizer, treats Erectile Dysfunction, a common sexual disorder faced by men. It is available as an oral medicine and allows the flow of blood towards the penis, enabling a prolonged erection.
However, without proper knowledge, using this drug could lead to unwanted side effects. In this blog, we will answer one of the most common questions, 'How long before sex should you take Viagra?', its side effects, and precautions.
How Long Viagra Takes to Work?
You should always remember that Viagra is a prescription drug and reacts differently for everyone. The medicine contains Sildenafil Citrate, one of the most effective Phosphodiesterase 5 (PDE-5) inhibitors. According to a PubMed study, more than 80% of men experienced an erection within 45 minutes after taking 50mg of Viagra, while 71% reported noticing the effects within 30 minutes. Based on these findings, the simple answer to how long before sex you should take Viagra is 30 minutes to 1 hour.
How Long Does Viagra Last?
The effects of Viagra last for up to 5 hours in your body. If you are sexually aroused, Viagra will enable you to get an erection up to 4 hours after taking a dose of Viagra. The drug's half-life or effectiveness is 3-5 hours, meaning that after this period, the amount of medicine in your body is reduced by half. It exits your body through excretion and urine. Even though Viagra might have its effect on your body for several hours, your erection should not last that long. However, in rare instances, it may cause priapism, leading to a long-lasting and painful erection.
Factors Affecting Viagra’s Onset Time
- Dosage: The dosage of Viagra can impact how quickly it takes effect. Higher prescribed doses, such as 100mg or 50mg, may begin to work sooner than lower doses, such as 25mg.
- Diet: Diet also plays a crucial part in Viagra’s onset. For instance, fatty meals tend to slow absorption, resulting in a delayed onset.
- Age: Age also affects Viagra’s onset time, as older individuals may experience a slower onset time.
- Metabolism: A faster rate of metabolism facilitates drug absorption, reducing its onset time.
- Other Factors: Several other elements can affect Viagra’s absorption and onset time, including medication use, existing health conditions, and lifestyle habits. These factors influence Viagra’s absorption and how quickly it starts working in your body. For instance, excessive drinking and alcohol may interfere with the drug’s absorption and can result in a delayed onset time.
Alternatives to Viagra
| Medicine | Manufacturer |
| Cenforce | Centurion Laboratories |
| Chocogra | Sunrise Remedies |
| Kamagra | Ajanta Pharma |
| Malegra | Sunrise Remedies |
| Manforce 50 | Mankind Pharma |
| Suhagra | Cipla |
| Sildisoft | Sunrise Remedies |
| P Force Fort | Sun Pharmaceutical Industries |
| Fildena | Fortune Healthcare |
| Sildalist Strong | RSM Enterprise |
Side Effects of Viagra to be Aware Of
- Headaches
- Flushing (Redness of the skin)
- Blocked nose (Nasal congestion)
- Indigestion
- Lightheadedness or dizziness
- Temporary vision changes
- Nausea
- Muscle and back aches
- Irregular Heartbeat: Viagra can cause mild irregularities in the heart rate, leading to palpitations. If you have a heart condition, you should consult your doctor before taking Viagra.
- Insomnia: Some people have reported difficulty sleeping after they have taken Viagra. If this happens, you should avoid caffeine and use Viagra earlier in the evening.
- Sudden Hearing Loss or Tinnitus (Ringing in the Ears): In extremely rare cases, Viagra may cause ringing in the ears or even hearing loss. This mainly happens due to Viagra’s effect on the blood flow to the ear. If you experience hearing loss, stop taking Viagra and immediately consult a doctor.
- Sudden Vision Loss (Non-Arteritic Anterior Ischemic Optic Neuropathy — NAION): In very rare cases, Viagra has been linked to vision loss due to reduced blood flow to the optic nerve. Individuals with eye diseases, diabetes, or heart conditions are at a higher risk of getting this side effect. If you experience vision impairment or blindness, stop using Viagra and consult a doctor immediately.
- Chest Pains and Heart Attack symptoms: Although Viagra is considered to be safe, it can strain the heart, especially in people with a history of heart disease. If you are experiencing symptoms such as chest pain or tightness, or pain spreading to the jaw, shoulder, or arm, stop taking the medication and seek medical attention immediately.
- Priapism: Priapism is a sporadic but dangerous condition where the erection does not go away. It occurs when blood is trapped in the penile area and leads to a painful and prolonged erection lasting more than 4 hours. You should seek medical help immediately if the erection does not go away within 4 hours. If this is left untreated, it might cause permanent erectile dysfunction.
- Low Blood Pressure (Hypotension): Viagra may sometimes cause a sudden drop in blood pressure, especially if it is taken with nitrate medications (Used to treat heart diseases). Always consult a doctor before taking Viagra if you are on nitrate medications.
- Severe Allergic Reactions (Anaphylaxis): Signs of an allergic reaction include hives, swelling of the face/lips/tongue/throat, and difficulty breathing. If you suspect an allergic reaction, seek medical help immediately.
Talking to Your Doctor
- Recent heart attack
- Kidney problems
- Liver problems
- Low blood pressure
- Heart rhythm problems
- Chest pain
- Stroke
- High blood pressure
- Stroke
- Heart surgery
- Sickle cell anemia
- Retinitis pigmentosa
- Peyronie’s disease
- Diabetes
- Pulmonary Veno-occlusive disease
- Bleeding problem
- Stomach ulcers





