Hello I share your concern. Sildenafil or tadanafil group of drug is there but you shouldn t take it without consulting your doctor. it has few side effects like hypotension, headache so I would advise you to consult your doctor before starting it. I am not sure whether it is available over the counter or not? I would advise you for non medicinal measures like spend quality time together, extend your foreplay Make you bed room more conducive for the sex. Don t be nervous or allay your anxiety by taking deep breaths and stop whenever you feel like to ejaculate. Hope this helps you. Please feel free to ask for follow up question I will gladly answer you. Best wishes