Clinically reviewed by Dr. Pipat Finn, M.D., Senior Doctor, Doctor Pattaya.
Last reviewed: September 2026
Avanafil, sold as Stendra in the US and Spedra in Europe, can start working in as little as 15 minutes. It belongs to the same drug class as Viagra and Cialis but targets the relevant enzyme more precisely, which means fewer side effects for most men. In Pattaya, you need a prescription to get it legally and safely. Doctor Pattaya is open 24/7 and can complete your assessment and issue a prescription in a single visit.
You did not plan for this to be an issue on holiday. Maybe it has been building for a while back home and you kept putting it off. Maybe travel, a few drinks, and unfamiliar surroundings caught you off guard. Either way, you are in Pattaya, you want a practical solution, and you want to understand your options before you walk anywhere.
Avanafil is worth knowing about, especially here. Speed matters when spontaneity is the whole point of the trip. Its fast onset sets it apart from older ED medications, and its cleaner side-effect profile makes it a strong option for men who have had bad experiences with Viagra or Cialis before. But it is still a prescription medication. In Pattaya there are enough unverified tablets going around that getting this right, with a real consultation and a real prescription, is worth the thirty minutes it takes.
What Is Avanafil (Stendra / Spedra)?
Avanafil belongs to the same family as sildenafil (Viagra), tadalafil (Cialis), and vardenafil (Levitra). These are called PDE5 inhibitors, which simply means they improve blood flow to the penis during sexual arousal. The result is a firmer, more reliable erection when stimulation is present.
It is sold as Stendra in the US and Spedra across the UK and Europe. The drug itself is identical regardless of the name on the box. UK and EU visitors often come in asking for Spedra specifically.
What sets avanafil apart is how precisely it targets the right enzyme. That precision means less interference with enzymes elsewhere in your body, which in practice translates to fewer visual disturbances, less flushing, and less back pain than some alternatives.
Avanafil vs. Viagra, Cialis, and Levitra
This is the question that comes up most often at the clinic, usually from men who have tried one option and want to know whether something else might suit them better.
| Avanafil (Stendra) | Sildenafil (Viagra) | Tadalafil (Cialis) | Vardenafil (Levitra) | |
|---|---|---|---|---|
| Onset | 15–30 min | 30–60 min | 30–60 min | 30–60 min |
| Duration | Up to 6 hours | 4–6 hours | Up to 36 hours | 4–6 hours |
| Food sensitivity | Low | High | Very low | Moderate |
| Visual side effects | Less common | More common | Less common | Less common |
| Back pain | Less common | Less common | More common | Less common |
| Prescription required | Yes | Yes | Yes | Yes |
If you want long-weekend coverage and do not mind planning ahead, tadalafil is often the right call. If you want something fast that fits around a normal evening, avanafil is hard to beat. For men who deal with performance anxiety, the shorter wait time genuinely helps.
You can read more about how avanafil compares to other ED medications and what to expect from each option.
Dosage: 50 mg, 100 mg, and 200 mg
Most men start at 100 mg, taken about 15 to 30 minutes before sexual activity. If that works well with no side effects, there is no reason to go higher. If it is not quite enough, a doctor can move you to 200 mg.
The 50 mg dose is used for older men, those with certain health conditions, or anyone on medications that may interact. It is also a sensible starting point if you have never taken this type of medication before.
Avanafil is taken only when you need it, not daily. One dose per 24 hours is the maximum.
Alcohol, Food, and Grapefruit in Pattaya
This is the section that matters most if you are here on holiday. Let me be straightforward.
Both avanafil and alcohol lower blood pressure. Together, that effect is stronger. The result can be dizziness, nausea, or a sudden pressure drop when you stand up, especially after a night out on Beach Road. More than two or three standard drinks alongside avanafil raises that risk meaningfully.
One or two drinks does not automatically rule it out. What matters is being honest with your doctor about how your evenings actually look, so the dose and timing can be matched to your night realistically. A pharmacist selling you tablets without a consultation will not have that conversation. We will.
Food is less of a problem than with Viagra. Avanafil is not meaningfully slowed by a meal, which makes it more flexible if you are heading out after dinner. Grapefruit is the exception. It affects the enzyme your body uses to process avanafil and can push the drug to unpredictable levels in your system, raising the chance of side effects. Skip the grapefruit juice that evening.
Who Should Not Take Avanafil
Avanafil is appropriate for most healthy men, but there are clear situations where it is not safe.
Do not take avanafil if you use nitrates. These are medications for angina or certain heart conditions, including nitroglycerin and isosorbide mononitrate, as well as recreational nitrites. Combining nitrates with avanafil can cause a severe, dangerous drop in blood pressure. This is an absolute contraindication, not just a caution.
Use with care if you take alpha-blockers for blood pressure or prostate conditions, as that combination can also lower blood pressure more than intended. Men who have had a recent heart attack or stroke should not take avanafil without clearance from a cardiologist.
Certain antifungal or HIV medications can cause avanafil to build up to higher levels in your blood than expected. Bring a full list of your current medications to your consultation so your doctor can check before prescribing.
Getting Avanafil in Pattaya Safely
Avanafil is a prescription medication in Thailand. You cannot legally or safely buy it without one. Counterfeit ED tablets are genuinely common in Pattaya, sold through unverified pharmacies or online. Without knowing what is actually in a tablet, you cannot assess your own safety.
At Doctor Pattaya, the process is straightforward. You walk in, we have a brief consultation, your health history and medications are reviewed, and if avanafil is appropriate, you leave with a legitimate prescription the same visit. We are open around the clock, so there is no planning ahead required.
If you are staying in Jomtien, Naklua, Pratumnak, or further out and prefer not to travel, we also offer doctor visits to your hotel across Pattaya. The consultation comes to you.
Avanafil and Sexual Health in Pattaya
One thing avanafil does not do: protect against sexually transmitted infections. It improves erectile function. It has no effect on STI risk whatsoever.
This is worth saying plainly. Pattaya is a place where people are often more sexually active than usual, sometimes with new partners. Avanafil makes sex easier. A condom is still what protects you from gonorrhoea, chlamydia, syphilis, and HIV.
If you have had unprotected sex or are unsure about recent exposures, Doctor Pattaya offers full STI screening and treatment alongside ED consultations. Many patients handle both in a single visit, which makes practical sense.
Thinking about avanafil or another ED medication? Doctor Pattaya is open 24 hours a day, seven days a week. Walk in for a consultation, or we can come to your hotel anywhere in the Pattaya area, including Jomtien, Naklua, and Pratumnak. We will review your health history, talk through your options honestly, and if avanafil is right for you, you will leave with a legitimate prescription the same day. No appointment needed.
Frequently Asked Questions
Dr. Pipat Finn is the senior doctor at Doctor Pattaya Takecare Clinic, a 24/7 walk-in medical practice on South Pattaya Road, Chonburi, Thailand. They provide primary care, travel medicine, sexual health, vaccination, minor surgery, IV therapy, and emergency outpatient services for tourists, expatriates, and Pattaya residents. Languages: English and Thai. WhatsApp consultations: +66 95 073 5550. Call: +66 81 668 5557.
