вторник, 3 марта 2015 г.

Drug tolerance



Drug tolerance is basically the body's ability to adapt to the presence of a drug. Pharmacology refers to the actions of drugs on mechanisms in the body. The effect of a drug is proportional to the concentration of that drug at its site of action.
Drug abuse refers to the use, usually by self-administration, of any drug in a manner that deviates from the approved medical or social patterns within a given culture. This definition is largely a social one. For any given drug, there is a large variation in what is considered abuse, not only from culture to culture, but also from one generation to another. Alcohol is a good example of this, as is the use of cigarette tobacco.
The magnitude of the body's response to a particular drug depends on two factors:
  • Concentration of the drug at its site of action
  • Sensitivity of the target site to the drug
The sensitivity of the target cells is governed by genetic factors and adaptive changes by the body. Adaptive changes occur in response to the repeated exposure to a particular drug. The result is usually a loss of sensitivity to the drug. This decreased response is called tolerance
Tolerance may be defined as a state of progressively decreased responsiveness to a drug as a result of which a larger dose of the drug is needed to achieve the effect originally obtained by a smaller dose.
Apcalis jelly is one of the most popular erectile dysfunction and premature ejaculation treatment pills manufactured by Ajanta Pharma. Apcalis jelly works similar to Cialis as it consist the same active ingredient, but has more different types (flavours). Apcalis oral jelly consist of Tadalafil active ingridient but produced with a wide selection of original flafours. In most cases though, it is best when taken 45 minutes prior to having sex. Apcalis Oral Jelly will be in the body for up to 4 hours. Apcalis Oral Jelly is a used to provide an erection when sexually stimulated. So, usage of the drug is restricted if you have a history of heart problems like arrhythmic disorders, heart attack or stroke.
If you notice any symptoms like, chest, shoulder, neck, or jaw pain; numbness of an arm or leg; severe dizziness, headache, nausea, stomach pain, or vomiting; fainting; or vision changes, while indulging in sexual activity or any other vigorous exercise, then stop doing it immediately. Seek emergency medical care for it might be signs of a heart attack.


Apcalis Oral Jelly is known to react adversely when combined with certain medications. The reactions are normally mild in nature but can be severe at times.
These medications include:
Nitrates in any form (Ointments, patches, pills). This includes any and all medications containing nitrates including Nitrostat, Nitrolingual, Nitro-Dur, Nitro-Bid, Minitran, Deponit, Transderm-Nitro, Dilatrate-SR, Isordil, Sorbitrate, sosorbide mononitrate (Imdur, ISMO, Monoket).
Recreational pills called poppers.
Bosentan (Tracleer);
A blood thinner such as warfarin (Coumadin);
Cimetidine (Tagamet, Tagamet HB);
An antibiotic such as erythromycin (E-Mycin, Eryc, Ery-Tab) or clarithromycin (Biaxin);
Doxazosin (Cardura), prazosin (Minipress), Terazosin (Hytrin);
HIV medicines such as amprenavir (Agenerase), tipranavir (Aptivus), darunavir (Prezista);
An antifungal medication such as itraconazole (Sporanox) or ketoconazole (Nizoral);
Carbamazepine (Tegretol), phenobarbital (Luminal), or phenytoin (Dilantin); or
Rifampin (Rifadin, Rimactane) or rifabutin (Mycobutin).