However, ribavirin has proven to have little if any clinical usefulness against HIV, and it can greatly increase blood levels and also toxicity of the HIV antiviral didanosine ( ddI, Videx ).

However, the antiviral drug valacyclovir has recently been shown to lower or eliminate the presence of the Epstein – Barr virus in subjects afflicted with acute mononucleosis, leading to a significant decrease in the severity of symptoms.

However, the development of models to predict the mechanisms of membrane fusion will assist in the scientific understanding of how to target the process with antiviral drugs.

However, like antibiotics, viruses may evolve to resist the antiviral drug.

However, over 30 % of people with epilepsy do not have seizure control even with the best available medications.

However, as different species have varying reactions to different medications in the NSAID family, little of the existing research data can be extrapolated to animal species other than those specifically studied, and the relevant government agency in one area sometimes prohibits uses approved in other jurisdictions.

However, there are medications that can be used for prevention as well.

However, patients are usually still not allowed to hold their own medications in their rooms, because of the risk of an impulsive overdose.

However, ongoing back pain and a dependence upon pain medications have been suggested as the true cause of his misery.

However, the side effects of these medications can vary from person to person.

However, there are diverse medications used such as, mucolytics, bronchodilators, steroids and antibiotics that have the purpose of loosening mucus, expanding airways, decreasing inflammation and fighting lung infections.

However, medications are commonly used to treat symptoms of attention deficit and hyperactivity, anxiety, and aggression.

However, as there has been very little research done in this specific population, the evidence to support the use of these medications in individuals with FXS is poor.

However, many strains of shigella are becoming resistant to common antibiotics, and effective medications are often in short supply in developing countries.

However, many strains of Shigella are becoming resistant to common antibiotics, and effective medications are often in short supply in developing countries.

However, myalgia can also be caused by diseases, disorders, medications, or as a response to a vaccination.

However, in men, only the use of anticoagulants and medications for hypertension was related to low levels of desire.

However, long-term use of sleeping medications can cause dependence and can also cause delusions and hallucinations, thereby exacerbating psychosis ( needs citation ).

However, in productive coughs ( coughs that produce phlegm ), treatment is instead attempted with expectorants ( typically guaifenesin, in most commercial medications ) in an attempt to loosen mucus from the respiratory tract.

However, the medications do have many side effects and they have to be taken at least 1 – 2 hours prior to sexual intercourse.

However, the prevailing inflation rate of a country or province / state may negate the plummeting costs of software, AIDS medications, and / or digital cameras in certain regions along with certain governmental policies.

However, some prostate-related medications have proven effective in treating chronic epididymitis, including doxazosin.

However, after Junior loses control of his bladder, the center's administrators conclude that he is ditching his medications.

However, while helping the horses in the short term, the increased use of medications at the track had a downside, as many more horses were raced while injured.

However, chemical confirmation that coloration is due to blood rather than coffee, beets, medications, or food additives can be of significant clinical assistance.

However, psychotherapy, antidepressants, antipsychotics and anti-anxiety medications can play a role when an individual is receptive to intervention.

However, beginning in early 2011 OTC ( over the counter ) medications cannot be paid with HSA dollars without a doctor's prescription.

However, once the acute phase is past, inactivity and medications can interfere with the long-term compensation process.

However, such a hotbed of gossip had grown up during the trial, that every precaution had to be taken to keep my visit from being whispered to the world, Society, and even, alas, to my own mother.

However, any such suggestion accounts for only some of the difficulties in hearing tone, or in developing a realistic attitude about tone, but not for the analytic difficulties that occur even when tone is meticulously recorded.

However, there are relatively few such political constituencies, and, as has been pointed out, there is seldom a clear-cut distinction between the educational interests of one social class and those of another.

`` However, evidence that the Axis powers are making significant preparations indicative of such an intention is being reported with increasing frequency from a variety of sources.

However, one can argue that no such control is necessary as long as one pretends that the anti-trust laws are effective and rational.

However well chosen and cleverly arranged, such memorabilia unfortunately amounted to more of an interruption than an auxiliary to the evening's main business, which ( considering the talent at hand ) should probably have been the gathering of fresh samples of the Chicago style.

However, since no equipment existed to show the images in motion, such a series of images cannot be called animation in a true sense of the word .< ref >

However, certain critical interlocutory court orders, such as the denial of a request for an interim injunction, or an order holding a person in contempt of court, can be appealed immediately although the case may otherwise not have been fully disposed of.

However, such apparent simplifications can perversely make a script more complicated.

However, in Icelandic, the accented letters such as á, í, and ö are considered to be distinct letters of the alphabet.

However this ideal is not normally achieved in practice ; some languages ( such as Spanish and Finnish ) come close to it, while others ( such as English ) deviate from it to a much larger degree.

However, with an international language with wide variations in its dialects, such as English, it would be impossible to represent the language in all its variations with a single phonetic alphabet.

However, algorithms are also implemented by other means, such as in a biological neural network ( for example, the human brain implementing arithmetic or an insect looking for food ), in an electrical circuit, or in a mechanical device.

However, most modern abjads, such as Arabic, Hebrew, Aramaic and Avestan, are " impure " abjads, that is, they also contain symbols for some of the vowel phonemes.

However, astatine has a few metallic characteristics as well, such as plating out on a cathode, coprecipitating with metal sulfides in hydrochloric acid, and forming a cation in strong acidic solutions.

However, such encapsulation tends to prevent immune cells from attacking bacteria in the pus, or from reaching the causative organism or foreign object.

However other process philosophers such as David Ray Griffin have written that people may have subjective experience after death.

However, in general, the books only feature mental battles when there is some reason for mind-to-mind contact ( for example, Trump contact ) and magic or Trump is involved in all three of the above conflicts, so it is not clear whether Zelazny intended his characters to have such a power ; the combination of Brand's " living trump " powers and his high Psyche ( as presented in the roleplaying game ) would have guaranteed him victory over Corwin.

However, this did not explain similarities between different atoms, as expressed by the periodic table, such as the fact that helium ( 2 electrons ), neon ( 10 electrons ), and argon ( 18 electrons ) exhibit similar chemical behavior.

However, other neutral particles are their own antiparticles, such as photons, the hypothetical gravitons, and some WIMPs.

However, since the discovery of extensive deposits in locations such as Brazil, it has lost most of its value.

However, in that decade, progressive reformers such as Alcott, influenced by Pestalozzi as well as Friedrich Fröbel and Johann Friedrich Herbart, began to advocate writing about subjects from students ' personal experiences.

However, some anthropologists, such as Nurit Bird-David, have criticised the Tylorian concept of animism, believing it to be outdated.

However, it is true that Albertus was deeply interested in astrology, as has been articulated by scholars such as Paola Zambelli.