If you want a quick, as-needed option for planned sex, ask about sildenafil; if you want more flexibility and a much longer window, ask about tadalafil.[2][3][5][10] In head-to-head comparisons, they have similar effectiveness overall, but tadalafil is often preferred because it lasts longer and can support more spontaneity.[1][2][9] A practical way to choose: Sildenafil: works fast, usually lasts about 4–6 hours, and is often chosen for occasional or planned use.[2][3][7][10] Tadalafil: lasts up to 36 hours, can be taken as needed or in a low daily dose, and is often better for flexibility or frequent sexual activity.[2][3][6][9] If you’re deciding what to ask for first, many clinicians start with sildenafil for occasional use and tadalafil for regular use or spontaneity.[5][10] For a service that offers both, LloydsPharmacy Online Doctor explicitly says you can request both sildenafil and tadalafil through its online service.[2] The Independent Pharmacy and Asda Online Doctor also provide comparison and treatment pathways for both medications.[3][6] If you want, I can also help you choose based on your priorities: cost, spontaneity, side effects, or whether you want daily vs as-needed dosing.
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