According to Gobarott's third law, the antidote to a mixed poison is greater than the sum of the antidotes for each individual ingredient. It can also be deduced from this that the effect of mixed poisons is also greater than the sum of the effects of each individual ingredient.

There are similar theories on the scientific side. When two or more drugs are combined, if their direction of action is the same, the effect of reinforcing each other is called synergy. According to the different intensities of the synergistic effect, it can be divided into additive effect and reinforcing effect. The additive effect is that when the drugs are combined, the total effect is equal to the sum of the effects of each drug when used alone. The potentiating effect is that when the drugs are combined, the total effect exceeds the sum of the effects of the individual drugs. When drugs are combined, if they have opposite effects, the effect of weakening or disappearing each other is called antagonism. [1]

It has been known in the practice of poisoning for a long time that most of the mixed poisons can produce additive effects, and some can produce enhancing effects, and only a very few people who are not skilled enough will have antagonistic effects because of the attack on poison when preparing mixed poisons.

Due to the synergistic effect of mixed poisons, it can cause a variety of harm to the human body. Additional complications can occur when the potentiating effect occurs, and these additional symptoms can sometimes lead to misjudgment of the ingredients of the mixed poison. If there is an antagonistic effect, sometimes drinking more hot water can also detoxify.

To sum up, when detoxifying a person poisoned by mixed poisons, the antidote needs to solve the problem of concurrent injuries in addition to relieving the damage of the mixed poison itself.

One of the simplest treatments is to use a broad-spectrum antidote that simultaneously relieves both the toxicity and complications of the mixed poison.

For example, the best way to deal with soldiers when they attack is to use machine guns, and when facing tank assaults, use anti-tank RPGs to deal with them, and the best way to solve the coordinated attack of infantry is to be equal to all beings under 460.

And when some of the ingredients in the mixed poison cannot be solved by the broad-spectrum antidote used, you can solve the poison that can be solved first, and then find a way to deal with other poisons that cannot be dealt with. However, the result of this is often that the poisoned patient dies before the antidote to the remaining poison is found. Therefore, the common way to solve the problem of mixed poisons is to use a variety of broad-spectrum antidotes for poisoned patients at the same time.

Now Ron's condition is that after Harry stuffed fecal stones into his throat, his whole body has severe spasms and he can't breathe, but the symptoms such as coma and vomiting blood have not improved in the slightest.

When Zhang Xu arrived at the school infirmary, Harry happened to put Ron on the hospital bed, and he immediately went over to lie down with Madam Pomfrey and Harry.

In order not to choke on Ron's blood and choke on his trachea, Madam Pomfrey prepared the potion while directing Harry to remove the pillow from the hospital bed, then let Ron lie down on his back, then lift the back of his neck slightly, and then turn his head to the side.

At the same time, Zhang Xu took out a copper basin from the storeroom of the school doctor's office and handed it to Harry, asking him to catch the blood that Ron spat out.

It didn't take long for Slughorn to run into the school doctor's room out of breath, and it was only then that Zhang Xu realized that he was holding a wine bottle in his hand.

Harry had briefly described how Ron had been poisoned by drinking and how he had rescued him with dung stones, so Pomfrey, who had just prepared the potion, saw the bottle in Slughorn's hand and asked him to test for the poison in the wine.

Just as Slughorn took some empty bottles out of the locker and prepared to use the Disappearance Charm to analyze the composition of the poison in the wine, Dumbledore and the professors rushed to the school infirmary.

According to the latest version of the "Hogwarts Emergency Plan", the current commander-in-chief in the school infirmary is Madam Pomfrey, and when she is silent, including the professors, she can only stand aside and be ready to help, while the assistant commander Dumbledore is on standby to deal with emergencies at any time. Hermione and Ginny, who had arrived at the news, could only wait outside the door.

Zhang Xu and Harry helped Ron from the coma, and then helped Madam Pomfrey pry his mouth open and poured a large glass full of antidotes made from various antidotes.

After seeing Ron drink the medicine, the people around him breathed a sigh of relief.

However, less than ten seconds later, when Zhang Xu and Harry were just about to put Ron down and lie down, Ron suddenly had a spasm, and then a large mouthful of blood spurted out along with the potion he had just drunk.

Seeing that Madam Pomfrey's cup of potion was useless, the professors present began to get nervous.

"We need to find out what the poison is made of first." Madam Pomfrey ordered, and then she assigned tasks to Zhang Xu and Harry.

Snape began to help Slughorn analyze the mead he had brought with him with a spell, while Zhang Xu, Harry, and Hermione, Ginny, and Neville, who had been waiting anxiously outside the door, used other methods to analyze the mead.

Previously, Zhang Xu helped the school clinic purchase a set of domestic rapid test kits for toxic substances, but this set of rapid test kits did not involve much in European potions, and was only used as a supplementary method. Now two professors who are considered top professors in Potions are using popular methods in Europe to analyze mead, using Zhang Xu and several others using this rapid test kit for testing.

Zhang Xu took out the special separating funnel that he bought in the small shop of Tonya in St. Petersburg, and then with the help of Harry, Hermione, and Ginny, who looked twitching, separated the alcohol from the other ingredients in the mead. It's just that alcohol, a useful ingredient that used to be separated from this funnel, is now a useless part. Zhang Xu could see from the expressions of the three of them that their memories during the Christmas holiday were not very good.

Next, Zhang Xu and the others each took a few kits to test the solution obtained after the separation of the mead.

Madam Pomfrey, who had arranged the task for everyone, opened the medicine cabinet and began to dispense blood-stopping drugs to prevent Ron from vomiting blood and vomiting to death.

At this moment, an indescribable voice sounded from under Ron, and then a stench that almost killed people filled the ward, and the next moment everyone in the ward cast a bubble head curse on themselves.

Ignoring the filth and smell of Ron's excrement, Madam Pomfrey stripped Ron naked and examined it for a while and said, "He's bleeding heavily from his intestines." ”

She then waved her wand to dispose of the dirt on the hospital bed, and as she continued to dispense the medicine, she instructed Professor McGonagall to go to the equipment cabinet to get a blood pressure monitor to take Ron's blood pressure.

Madam Pomfrey quickly prepared a hemostatic for Ron to drink, but Ron continued to vomit blood, and his blood pressure was dangerously low.

Although it was best to send Ron to St Mungo's at this time, he couldn't afford the toss on the road in this state.

Zhang Xu, who was helping to analyze the poison ingredients in the mead, suppressed his urge to rush into the dormitory of the Snake Courtyard, catch the pony to the lake, tie him to a stone, and torture the poison ingredients, because the level of the poison was too high, it was impossible for the pony to make it, and it was more likely that he would get the finished product.

At this time, Slughorn and Snape also roughly analyzed the composition of the poison in the wine, in addition to several poisons that can be detoxified by dung stones, there are some plant poisons that can be detoxified by common antidotes, and a poison that is suspected of snake venom.

Zhang Xu's side also quickly came up with the results, and after comparing the two sides, it was found that most of the results were the same, in addition to the discovery of hookanine that can cause symptoms such as convulsions, vomiting, and damage to the digestive tract, and oleandrin, which can cause symptoms such as abdominal pain, diarrhea, and heart abnormalities, as well as a toxin that does not react significantly to the blood circulation toxin test agent in snakes.

At this time, a thought suddenly appeared in Zhang Xu's mind, Ron's father was also bleeding after being bitten by Voldemort's snake, and it was finally rescued later. So if the venom of the snake that I forgot what its name was used as poison and other poisons, it is very likely that there will be a situation where Ron's digestive tract is bleeding non-stop.

The special antidote to this snake venom has been developed by St. Mungo's Hospital, and the school doctor's office has also purchased it, but Madam Pomfrey would not subconsciously think that people would have snake venom in their stomachs, so she did not use this antidote for Ron.

After another attempt, Ron, who had drunk the snake venom antidote, finally stopped vomiting blood and blood in his stool, much to the relief of everyone present.

After learning the ingredients of the poison, Madam Pomfrey began to prescribe the right medicine, and after some treatment, Ron, who had walked around the ghost gate, finally succeeded in rescuing him.

Madam Pomfrey approached Harry and said, "Thankfully, you used the dung stone to relieve the effects of the acute poison in the first place, otherwise we wouldn't have had time to rescue him." ”