Seit 1717 hatte man in Spanien zu befürchten, dass ihr König Philipp V. dem Wahnsinn verfallen würde. "Philip's health was becoming a source of constant anxiety. He believed himself to be suffering from an internal fire, which the doctors declared to be a pure delusion. By the autumn of 1717 the malady had developed alarming energy. 'For the last eight months,' wrote Alberoni [der wichtigste Ratgeber des Königs, der Kardinal Giulio Alberoni], 'this poor gentleman has been showing symptoms of insanity, his imagination inducing him to believe that he is destined to die immediately, fancying himself attacked by all sorts of diseases in turn.' He fancied that the sun had struck his shoulder and penetrated into his weaker organs. To all the arguments that were adduced against the possibility of such a malady he would reply that he had the misfortune not to be believed, and that death alone would justify his statement. Alberoni thought that he might become totally insane, and the doctors feared for his life. He could not sleep, and became thinner day by day. ... At the close of the year Philip's bodily health improved, though his mind still halted. He fancied himself to be dying from moment to moment, and would often call the confessor at between two and three o'clock at night. ... The king's health was naturally the all-absorbing subject of interest for the queen [Elisabetta Farnese]. There is little doubt that she was now sincerely attached to him. Alberoni described their touching tenderness for each other. They always hunted together, and their sport took the form of wholesale slaughter - six stages falling in two hours. ... He could retain nothing that he ate, and yet he was always eating. His legs were swollen, and he was unable to stand upright. His scruples of conscience were increasing, and the worst of all was that there was no hope that he would allow himself to be cured. Other ambassadors regarded the queen as being the absolute mistress of the king. Alberoni describes her as his perfect slave. She would ask no favour for herself or her friends. She was literally unable to be alone for a single moment in the day. The king followed her wherever she might go. 'She has so vehement a passion for him that it has reduced her to a blind subjection and to complete loss of will ... Would to God that the queen would have had the strength to do what I have for two years been suggesting, with tears in my eyes, and perhaps we should not now be in the condition in which we are. The king requires governing as he was governed by the late queen [die erste Gattin von Philipp V., Maria Luisa von Savoyen].'" (in: Edward Armstrong: Elisabeth Farnese – "The Termagant of Spain", id., pp. 107-109).
Weitere historische Quelle, die Philipp V. und seine Krankheit seit 1717 beschreibt: "His [Philipps V.] condition was aggravated during the summer of 1717 by a recurrence of the depressive illness that he had suffered in earlier years, the problem in all likelihood having remained under control for some time because of Elizabeth's attention to her husband. ... Attacks were episodic rather than continuous. There were days when he was normal, and days when he was unable to do anything at all and simply retired to bed. Some of the symptoms of his illness include, as we know, sleep and eating disturbances, a loss of energy, feelings of worthlessness and helplessness, difficulty in concentrating, suicidal thoughts, and a loss of a sense of pleasure and interest in life. ... He would sometimes relapse into complete silence for a day, refusing even to speak to Elizabeth. In these circumstances, it was difficult to encourage him even to change his clothes. ... The queen attended him faithfully, though she was pregnant in the latter part of 1717 (she gave birth on 31 March 1718 to Maria Ana Victoria). ... [im Jahr 1719] His place in the army was gallantly taken by Elizabeth, who inspected the troops in the king's name, on horseback and wearing a set of pistols." (in: Henry Kamen: Philip V of Spain – The King who reigned twice, id., pp. 121-122/126).
Philipps gesundheitlicher Zustand im Jahr 1726: "... by the end of October Philip was struck down again, this time with serious physical symptoms. He appeared to have lost all use of his body, though his mind remained active and clear. Three assistants were required to help him get out of bed. Normally he would lie there for hours, doing nothing but staring fixedly at the ceiling and moving his lips soundlessly. Elizabeth [Elisabetta Farnese] was at his side by day and night. Then in November news arrived from France that the king, Louis XV, was ill. The information was exactly the therapy that Philip needed. It awoke in him his profound concern for the situation in France and immediately galvanised him into hyperactivity, the other pole of his depression. He decided to reassert his rights to the French throne ... His instruction to Montgon, dated Christmas Day 1726, stated explicitly that if the young king were to die without issue, 'since I am the closest relative, I have the right to succeed to the crown'. His obsession with the French succession remained with him all his life." (in: Henry Kamen: Philip V of Spain – The King who reigned twice, id., p. 160).
Philipps gesundheitlicher Zustand im Jahr 1727: "The king's illness came and went, each time assuming stranger, and more severe forms. At the end of May 1727 he was taken unwell again, in Aranjuez, and could not engage in the tasks of government. The doctors bled him because he had a slight fever. Elizabeth dutifully played her part as governor (she was formally granted the powers by a decree of 2 June) and also directed foreign policy, but refused to make any major decisions until the king had recovered." (in: Henry Kamen: Philip V of Spain – The King who reigned twice, id., p. 162).
Philipps gesundheitlicher Zustand im Jahr 1728: "He now suffered attacks that caused him to spend several days at a time in bed, and he also began to invert the order of day and night. Sometimes he would not see his ministers for weeks ... The most serious development came in June: he made it clear that he was going to abdicate again. Elizabeth recognized the auto-destructive forms of the illness and was fully prepared for the crisis, which took extreme forms. She attempted to talk to Philip, but he refused to listen to reason and their discussions ended up as serious, sometimes daily, quarrels. When Philip became very angry he also became violent and beat her. Elizabeth in one audience that she had alone with the French ambassador had to explain to him the very visible scratches and bruises that she had suffered. It was, she told him, 'a cruel situation'. ... His conduct at times was wholly bizarre. He spent several days at a time in bed. He was allowed to perform most of his duties, but with unexpected results. He would sometimes give audiences to ambassadors dressed only in his nightshirt or almost naked, without trousers or shoes. He also began to develop the most extreme symptoms of manic disorder: apart from being unable to sleep, he began to suffer from terrors, delusions and hallucinations. He dwelt again on the plots against him that had been backed by Orléans [Philippe II., Herzog von Orléans]. Because he was afraid of being poisoned through a shirt ... he would only wear shirts that Elizabeth had worn previously, and in one ambassadorial audience presented himself wearing two shirts, Elizabeth's under his own. At certain times, he would behave quite irrationally: at night he would bite himself, or scream, or start singing. Sometimes he would urinate and evacuate in his bed. His psychotic condition led him to withdraw totally from reality. At one time in July he believed that he was a frog, at another time he believed that he was dead. On occasion, he would have attacks of bulimia, and would eat voraciously for an hour or so without stopping. At every stage, when he was stable and when he suffered attacks of his illness, Elizabeth attended personally to his needs and attempted to control the impact of Philip's behaviour. In a private letter of June 1728 the marquis of la Paz expressed his admiration for the way in which she coped. 'Despite all her cares and concerns, the queen remains strong and in perfect health, and she needs all of it to stand up to this constant anxiety.'" (in: Henry Kamen: Philip V of Spain – The King who reigned twice, id., pp. 162-165).
Philipps gesundheitlicher Zustand in den Jahren 1730 bis 1733: "[Im Jahr 1730] He also rejected any attention to his person with the result that his toenails grew very long, making it difficult for him to walk. He would not allow anyone to arrange his hair, which likewise grew very long and unkempt; his solution to this was to stick a wig on the top of his unruly mop ... If Patiño [José Patiño, Erster Staatssekretär von Spanien für das Kriegswesen und die Finanzen] placed before him a carefully arranged pile of papers that had to be signed in a certain order, he would surreptitiously change the order when Patiño was not looking, placing at the bottom papers that had been at the top. ... [Im Jahr 1731] In January 1731 Philip usually went to bed at 8 a.m., then woke up for his 'morning' mass at 4 p.m., and had lunch after it. At this stage of Philip's terrible illness, the queen, who always shared the king's bedroom, displayed her incredible resilience by attempting to lead a normal life and doing things at fairly reasonable hours; she heard her morning mass, for example, at 6 a.m. ... There was, finally, a severe crisis in July. At this point, he slept only about one hour in every twenty-four. ... He walked about the Alcázar with his mouth open and his tongue hanging out. His legs were grossly swollen." [Im Jahr 1732] "From the end of the summer of 1732, he entered into another period of profound depression. From the end of August he said that he preferred to remain in bed, even though he was not apparently unwell. He would lie there for several days, saying nothing, with his finger in his mouth. The situation continued for weeks. He refused to change his bed-sheets or his clothes, and would not allow himself to be shaved or have his hair combed or his nails cut. After a month of this, by the end of which the king both looked and smelled awful, Elizabeth became desperate and decided to take over. She nominated a ruling council consisting of seven persons including the Prince of Asturias [Philipps Sohn Ferdinand VI.] and Patiño. The king's hand was held for him to sign the decree setting it up. It was a wise move, for matters only got worse. ... In the first fortnight of October, Philip refused to talk to anyone, except to say a few words to his wife and to Ferdinand. There was, according to him, logic in his madness. His silence, he said, was because he was really dead and therefore could not speak ..." In the middle of November, Philip insisted on conceding an audience to the count of Rottembourg. The startled count was presented with the spectacle of a king with his clothing completely disordered, with a long and filthy beard, and wearing no trousers or shoes, his legs and feet naked. The situation at court continued in this manner. Suddenly, on the day after Christmas, he king appeared like new, clean, shaven, well-dressed. He rose from bed at a normal time, 9 a.m., and dined not in bed but at table. But it was no recovery. Soon he was back in his bed, where he would lie immobile for hours, clutching his head with his hands and staring up at the ceiling, his mouth open. ... [Im Jahr 1733] As it happened, it was a new international crisis, over the succession to a throne, that brought Philip back to the real world of everyday events. In February 1733 the king of Poland, Augustus II, died. Poland had one of the few monarchies in Europe that was not hereditary but elected by its parliament ... As soon as Philip received the news in Seville, his condition changed ... 'He leaped from the bed' ... In the first week of March, a messenger was sent in secret from Seville to Warsaw to negotiate the possibility of the throne for the Infante Philip (then aged twelve) or even for Charles. His mind now firmly concentrated on a concrete issue, Philip had no time for his depression, and he began acting again with his old enthusiasm." (in: Henry Kamen: Philip V of Spain – The King who reigned twice, id., pp. 178-190).
Philipps gesundheitlicher Zustand im Jahr 1738: "In August that year Keene [Benjamin Keene, britischer Diplomat] reported that when the king 'retires to dinner, he sets up frightful howlings'. One such howling, at the end of July, 'lasted from 12 midnight till past 2 in the morning'." (in: Henry Kamen: Philip V of Spain – The King who reigned twice, id., p. 214).