Stay hard longer
I just googled "viagra nz" and found a medsafe article that says "you can only get viagra with a doctors prescription or from a pharmacist trained to supply sildenafil without a doctors prescription".
it's easier with a prescription, but some pharmacies will, but you have to answer some health questions and they check your blood pressure. this little checkup should be free. last year i found one chemist on K rd wanted to charge me, another was free. i think it was 'Newton Pharmacy' that was free. it was a while ago.
Put an advert on Trade me. Lol.