It used to work like clockwork. Now it's hit-or-miss, or just weaker than it was. The instinct is immediate and understandable: you've built up a "tolerance," your body has gone immune to it. It's a reasonable fear — and it's almost always the wrong one. When a sildenafil product like Kamagra seems to lose its punch over months or years, the real culprit is usually hiding somewhere else entirely. So let's line up the suspects.

Suspect #1: The Sachet Itself

Start here, because with Kamagra it's the most overlooked. As an unregulated, grey-market product, a Kamagra jelly comes with no guarantee that this sachet contains the same amount of sildenafil as the last one — or any reliable amount at all. Batches vary, counterfeits circulate, and gels sitting in a hot drawer past their best can quietly degrade. So "it worked last month and not this month" may have nothing to do with your body and everything to do with a weaker or fake sachet. Before suspecting yourself, suspect the product.

Suspect #2: Your ED Has Moved On

This is the big one — the most common genuine reason. Erectile dysfunction is usually a symptom of underlying health, especially the state of your blood vessels, and that underlying picture tends to drift over time. The same pill is now being asked to push blood through older, stiffer plumbing. Creeping diabetes, rising blood pressure, heart disease, or falling testosterone can all quietly erode the effect, while the medication itself hasn't changed one bit. The drug didn't get weaker; the problem got bigger.

Suspect #3: The Slow Drift of Lifestyle

Small things stack up. Maybe you've put on weight, started drinking a bit more, picked smoking back up, or stopped exercising. Maybe you used to take it on a fairly empty stomach and now sex happens after a heavy takeaway and dessert, which blunts absorption. None of these feel dramatic in the moment, but together they can turn a reliable result into a patchy one.

Suspect #4: The Head

Stress, anxiety, low mood, and relationship strain are quietly powerful, and no amount of blood flow overrides a preoccupied mind. There's a subtler version too: if the pill is being used without a real physical need, the brain can start to feel it can't perform without it — a psychological reliance that masquerades as the drug "no longer being enough."

The Suspect Who's Almost Always Innocent: Tolerance

And here's the twist in the case. True pharmacological tolerance — the kind where your tissues genuinely stop responding to a drug — has never been convincingly shown for sildenafil. Unlike some medications, PDE5 inhibitors don't appear to cause that fade, and most experts pin any "waning" squarely on the underlying disease progressing rather than the drug wearing out. Plenty of men take the same dose effectively for years. So the suspect everyone arrests first is usually the one with the alibi.

Closing the Case

The dangerous reaction is to simply take more — a bigger squeeze, a second sachet — which raises your risk of side effects without touching the actual cause. The smarter move is to ask "what's changed since it first worked?" and take that question to a doctor, who can switch you to a different option like tadalafil, check your testosterone and cardiovascular health, or help with the lifestyle pieces. That last point matters more than it sounds: a pill that suddenly stops working can be an early warning that your heart and blood vessels need attention. For a clear look at what really changes how sildenafil works for you, the detailed guide is worth reading.

"It's not working like it used to" is one of the most common worries in men's health, and one of the most misdiagnosed. The story you tell yourself — that you've burned out the drug — is almost never the true one. Find the real suspect, and you usually find something fixable: a dodgy sachet, a health change worth catching early, a habit worth adjusting, or a head worth clearing. The pill isn't giving up on you; it's just pointing at something else that's quietly asking for attention.