Due to stringent restrictions and regulations for pharmaceutical companies in the Philippines, new entrants would have a harder time entering the market due to the complex approval processes and the substantial time it would take for new entrants to gain trust within the market in order to establish a new pharmaceutical firm. Unilab, being one of the major firms in the Philippine Pharmaceutical business has established itself as one of the most reputable medical companies in the Philippines as a result of the many years of their Unilab's existence.

Unilab relies on manufacturing firms such as Amherst Parenterals Inc. (injectible products), Asian Antibiotics Inc. (antibiotic and steroid production), and Belmont Softgel Pharma Corporation (capsule production). Though Unilab indeed does have its own manufacturing supply chain (Unilab Manufacturing Plant), it still relies heavily upon its suppliers in order to meet production needs and target sales to continue manufacturing pharmaceutical products. According to Unilab's official website, Unilab made history as the inaugural recipient of the Philippine Quality Award (PQA) for Performance Excellence, a distinction that remains unclaimed by any other organization to date.

Manufacturers like Unilab give buyers negotiating power in the context of a pharmaceutical and healthcare company like Unilab depending on several variables. The ability of customers to affect the terms and circumstances of a transaction or to bargain for better pricing and services is referred to as their bargaining power. The following variables may have an impact on the purchasers' ability to negotiate with Unilab. Unilab's buyers such as Clareo International Inc and Aic. Because there are so many customers in the pharmaceutical and healthcare sectors, each customer may have less personal bargaining power because Unilab can simply find substitute clients. On the other hand, buyers might have more negotiating leverage if there are fewer buyers or if Unilab holds a significant percentage of the market share. So, the bargaining power of customers may also be impacted by Unilab's brand reputation and customer loyalty. Positive customer relationships and strong brand recognition may lessen buyer power.

Unilab has to be aware of the threat of some of the substitutes to the products that they sell. Some of these substitutes are generic drugs, alternative treatments to medicine, herbal remedies, and exercise and a balanced diet. Generic drugs are cheaper than drugs that are branded but they usually are composed of the same or similar chemical ingredients. Unilab must make sure that even though their products are branded, they should still be somewhat competitive in price to the generic drugs or else people will opt to buy generic drugs if the prices of branded drugs are exorbitantly high. There are also alternative treatments to medicine like acupuncture, meditation, and yoga.  These alternative treatments are more natural and could be more attractive to people who want more natural treatments. This is why Unilab must make sure that their products are safe and they should also make sure that their customers know that their products are safe so that the customers can be assured that there is no danger when taking the products made by Unilab. Unilab also has to take into account herbal remedies like ginseng and gingko biloba.  These herbal remedies can be an alternative for people looking for something different than pharmaceutical medicine. Unilab must make sure to take these herbal remedies into account as some people could opt for these herbal remedies instead of their products. Finally, exercise and having a balanced diet and healthy lifestyle is also a substitute for Unilab's products. Living a healthy lifestyle without taking medicine is a more natural approach and some people may prefer that.