Over the counter pills?

Does any one know of any over the counter pills that could aid in Suicide? I'm NOT trying to kill myself, but I'm writing a story and I'm drawing blanks on anything I know of that could work.
Again.. not trying to kill myself lol. It's not my style..
But anyways, any one know of anything??
Answer:
I cannot think of anything OTC that would do it even if mixed with alcohol. A lethal dose of alcohol would work but you first have to drink for a long time to get your stomach used to it or you will just vomit.
There are poisons like arsenic - but they are highly regulated and just as hard to get as prescription drugs that can kill you.
Suicide is usually through overdosing on prescriptions or some violent means - our society has tried to make it difficult to kill yourself

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Excedrin PM

Swallowing lye, Drano, oven cleaner, and other household caustics is supposedly the most painful way in which to die from a drug overdose. It seeems that very few people that ingest caustics die, and if they do die, it's days, weeks or even months later, of infection. Caustics scar the mouth and tongue, puncture holes in the esophagus, burn the chest from the inside and block the gastrointestinal tract with scar tissue. Even the process of treating the inner burns is painful; surgeons drop an endoscope, or fiber-optic camera, down the person's throat, unavoidably scraping against the raw nerves there, to see what the damage is. Repairing an inner burn can take fifteen to twenty years worth of surgical operations plus fluid therapy and antibiotics to keep infections from growing. Swallowing can be painful for the rest of the person's life, and survivors of such attempts have to be fed intravenously for years afterwards.Sleeping pills and mood pills- the sedative hypnotics- barbiturates like Seconal, mild tranquilizer like Valium are used quite commonly for suicides. Typically, a sedative overdose will do nothing more than put you to sleep for a day or two and leave you with a bad hangover and a case of the slows when you wake up. But like many other overdoses, sedatives are often taken with alcohol, which makes people nauseous. Anyone who vomits when they're passed out risks sucking some of the vomit into their lungs, which is called aspiration. Vomit contains enzymes from the stomach that destroy tissue, and those go to work on the lung walls. It also contains a rich broth of food, perfect for pneumonia bugs to grow in. People can also drown in vomit; which keeps air from getting to the brain, which once again causes brain damage. An aspirating patient goes into intensive care; a device called a bronchoscope is used to look into their lungs and pull out whatever pieces of vomit it can.

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