Stop taking the pills and seek immediate medical attention if you have a serious side-effect such as:
sudden decrease or loss of vision
an allergic reaction (eg difficulty breathing, wheeze and swelling of the lips, eyelids or face)
a seizure or fit
People on nitrate pills for angina should not take Viagra Connect. That also goes for people taking recreational poppers (amyl nitrate).
There is also a clash with a medicine called riociguat and an HIV medication called ritonavir.
Make sure you tell the pharmacists about any treatments you are taking so they can check it will be safe for you to also have Viagra Connect.
Pharmacists should advise men to book a follow-up appointment with their doctor within six months of starting on Viagra Connect because erectile dysfunction can sometimes be a sign of other underlying conditions, including heart disease, high cholesterol and diabetes.
Can I get it anywhere else?
GPs can prescribe it. And some pharmacies will be selling it online, after a virtual consultation.
Always check that the seller is reputable. Drugs from unregulated sellers may be fake, ineffective and unsafe.